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All articles tagged with Red Hat

March 06, 2013 10:25 Red Hat: Security update for OpenJDK

1

These packages provide the OpenJDK 7 Java Runtime Environment and the OpenJDK 7 Software Development Kit. Multiple improper permission check issues were discovered in the JMX and Libraries components in OpenJDK. An untrusted Java application or applet could use these flaws to bypass Java sandbox restrictions. An improper permission check issue was discovered in the Libraries component in OpenJDK. An untrusted Java application or applet could use this flaw to bypass certain Java sandbox restrictions. It was discovered that OpenJDK leaked timing information when decrypting TLS/SSL protocol encrypted records when CBC-mode cipher suites were used. A remote attacker could possibly use this flaw to retrieve plain text from the encrypted packets by using a TLS/SSL server as a padding oracle.

Updated packages are available from ftp.redhat.com.

March 06, 2013 10:24 Red Hat: Security update for OpenJDK

2

These packages provide the OpenJDK 6 Java Runtime Environment and the OpenJDK 6 Software Development Kit. An improper permission check issue was discovered in the JMX component in OpenJDK. An untrusted Java application or applet could use this flaw to bypass Java sandbox restrictions. It was discovered that OpenJDK leaked timing information when decrypting TLS/SSL protocol encrypted records when CBC-mode cipher suites were used. A remote attacker could possibly use this flaw to retrieve plain text from the encrypted packets by using a TLS/SSL server as a padding oracle.

Updated packages are available from ftp.redhat.com.

March 06, 2013 09:51 Red Hat: Security update for OpenJDK

0

These packages provide the OpenJDK 6 Java Runtime Environment and the OpenJDK 6 Software Development Kit. An improper permission check issue was discovered in the JMX component in OpenJDK. An untrusted Java application or applet could use this flaw to bypass Java sandbox restrictions. It was discovered that OpenJDK leaked timing information when decrypting TLS/SSL protocol encrypted records when CBC-mode cipher suites were used. A remote attacker could possibly use this flaw to retrieve plain text from the encrypted packets by using a TLS/SSL server as a padding oracle.

Updated packages are available from ftp.redhat.com.

March 05, 2013 09:03 Red Hat: Security update for Mozilla Thunderbird

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Mozilla Thunderbird is a standalone mail and newsgroup client. Several flaws were found in the processing of malformed content. Malicious content could cause Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running Thunderbird. It was found that, after canceling a proxy server’s authentication prompt, the address bar continued to show the requested site’s address. An attacker could use this flaw to conduct phishing attacks by tricking a user into believing they are viewing trusted content.

Updated packages are available from ftp.redhat.com.

March 05, 2013 09:01 Red Hat: Security update for Mozilla Firefox

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Mozilla Firefox is an open source web browser. XULRunner provides the XUL Runtime environment for Mozilla Firefox. Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox. It was found that, after canceling a proxy server’s authentication prompt, the address bar continued to show the requested site’s address. An attacker could use this flaw to conduct phishing attacks by tricking a user into believing they are viewing a trusted site.

Updated packages are available from ftp.redhat.com.

March 05, 2013 09:00 Red Hat: Security update for Apache Axis

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Apache Axis is an implementation of SOAP (Simple Object Access Protocol). It can be used to build both web service clients and servers. Apache Axis did not verify that the server hostname matched the domain name in the subject’s Common Name (CN) or subjectAltName field in X.509 certificates. This could allow a man-in-the-middle attacker to spoof an SSL server if they had a certificate that was valid for any domain name.

Updated packages are available from ftp.redhat.com.

February 22, 2013 13:16 Red Hat: Security update for ELinks

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ELinks is a text-based web browser. ELinks does not display any images, but it does support frames, tables, and most other HTML tags. It was found that ELinks performed client credentials delegation during the client-to-server GSS security mechanisms negotiation. A rogue server could use this flaw to obtain the client’s credentials and impersonate that client to other servers that are using GSSAPI.

Updated packages are available from ftp.redhat.com.

February 22, 2013 13:14 Red Hat: Security update for OpenJDK

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These packages provide the OpenJDK 7 Java Runtime Environment and the OpenJDK 7 Software Development Kit. Multiple improper permission check issues were discovered in the AWT, CORBA, JMX, Libraries, and Beans components in OpenJDK. An untrusted Java application or applet could use these flaws to bypass Java sandbox restrictions. Multiple flaws were found in the way image parsers in the 2D and AWT components handled image raster parameters. A specially-crafted image could cause Java Virtual Machine memory corruption and, possibly, lead to arbitrary code execution with the virtual machine privileges.

A flaw was found in the AWT component’s clipboard handling code. An untrusted Java application or applet could use this flaw to access clipboard data, bypassing Java sandbox restrictions. The default Java security properties configuration did not restrict access to certain com.sun.xml.internal packages. An untrusted Java application or applet could use this flaw to access information, bypassing certain Java sandbox restrictions. This update lists the whole package as restricted. Multiple improper permission check issues were discovered in the JMX, Libraries, Networking, and JAXP components. An untrusted Java application or applet could use these flaws to bypass certain Java sandbox restrictions.

It was discovered that the RMI component’s CGIHandler class used user inputs in error messages without any sanitization. An attacker could use this flaw to perform a cross-site scripting (XSS) attack. It was discovered that the SSL/TLS implementation in the JSSE component did not properly enforce handshake message ordering, allowing an unlimited number of handshake restarts. A remote attacker could use this flaw to make an SSL/TLS server using JSSE consume an excessive amount of CPU by continuously restarting the handshake. It was discovered that the JSSE component did not properly validate Diffie-Hellman public keys. An SSL/TLS client could possibly use this flaw to perform a small subgroup attack.

Updated packages are available from ftp.redhat.com.

February 22, 2013 13:08 Red Hat: Security update for OpenJDK

0

These packages provide the OpenJDK 6 Java Runtime Environment and the OpenJDK 6 Software Development Kit. Multiple improper permission check issues were discovered in the AWT, CORBA, JMX, and Libraries components in OpenJDK. An untrusted Java application or applet could use these flaws to bypass Java sandbox restrictions. Multiple flaws were found in the way image parsers in the 2D and AWT components handled image raster parameters. A specially-crafted image could cause Java Virtual Machine memory corruption and, possibly, lead to arbitrary code execution with the virtual machine privileges. A flaw was found in the AWT component’s clipboard handling code. An untrusted Java application or applet could use this flaw to access clipboard data, bypassing Java sandbox restrictions.

The default Java security properties configuration did not restrict access to certain com.sun.xml.internal packages. An untrusted Java application or applet could use this flaw to access information, bypassing certain Java sandbox restrictions. This update lists the whole package as restricted. Multiple improper permission check issues were discovered in the Libraries, Networking, and JAXP components. An untrusted Java application or applet could use these flaws to bypass certain Java sandbox restrictions. It was discovered that the RMI component’s CGIHandler class used user inputs in error messages without any sanitization. An attacker could use this flaw to perform a cross-site scripting (XSS) attack.

It was discovered that the SSL/TLS implementation in the JSSE component did not properly enforce handshake message ordering, allowing an unlimited number of handshake restarts. A remote attacker could use this flaw to make an SSL/TLS server using JSSE consume an excessive amount of CPU by continuously restarting the handshake. It was discovered that the JSSE component did not properly validate Diffie-Hellman public keys. An SSL/TLS client could possibly use this flaw to perform a small subgroup attack.

Updated packages are available from ftp.redhat.com.

February 20, 2013 09:09 Red Hat: Security update for OpenJDK 6

0

These packages provide the OpenJDK 6 Java Runtime Environment and the OpenJDK 6 Software Development Kit. Multiple improper permission check issues were discovered in the AWT, CORBA, JMX, and Libraries components in OpenJDK. An untrusted Java application or applet could use these flaws to bypass Java sandbox restrictions. Multiple flaws were found in the way image parsers in the 2D and AWT components handled image raster parameters. A specially-crafted image could cause Java Virtual Machine memory corruption and, possibly, lead to arbitrary code execution with the virtual machine privileges.

A flaw was found in the AWT component’s clipboard handling code. An untrusted Java application or applet could use this flaw to access clipboard data, bypassing Java sandbox restrictions. The default Java security properties configuration did not restrict access to certain com.sun.xml.internal packages. An untrusted Java application or applet could use this flaw to access information, bypassing certain Java sandbox restrictions. This update lists the whole package as restricted. Multiple improper permission check issues were discovered in the Libraries, Networking, and JAXP components. An untrusted Java application or applet could use these flaws to bypass certain Java sandbox restrictions.

It was discovered that the RMI component’s CGIHandler class used user inputs in error messages without any sanitization. An attacker could use this flaw to perform a cross-site scripting (XSS) attack. It was discovered that the SSL/TLS implementation in the JSSE component did not properly enforce handshake message ordering, allowing an unlimited number of handshake restarts. A remote attacker could use this flaw to make an SSL/TLS server using JSSE consume an excessive amount of CPU by continuously restarting the handshake. It was discovered that the JSSE component did not properly validate Diffie-Hellman public keys. An SSL/TLS client could possibly use this flaw to perform a small subgroup attack.

Updated packages are available from ftp.redhat.com.

February 20, 2013 09:07 Red Hat: Security update for flash-plugin

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The flash-plugin package contains a Mozilla Firefox compatible Adobe Flash Player web browser plug-in. This update fixes two vulnerabilities in Adobe Flash Player. These vulnerabilities are detailed in the Adobe Security bulletin APSB13-04, listed in the References section. Specially-crafted SWF content could cause flash-plugin to crash or, potentially, execute arbitrary code when a victim loads a page containing the malicious SWF content.

Updated packages are available from ftp.redhat.com.

February 20, 2013 09:05 Red Hat: Security update for xen

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The xen packages contain administration tools and the xend service for managing the kernel-xen kernel for virtualization on Red Hat Enterprise Linux. A flaw was found in the way libxc, the Xen control library, handled excessively large kernel and ramdisk images when starting new guests. A privileged guest user in a para-virtualized guest (a DomU) could create a crafted kernel or ramdisk image that, when attempting to use it during guest start, could result in an out-of-memory condition in the privileged domain (the Dom0).

Updated packages are available from ftp.redhat.com.

February 18, 2013 18:15 Red Hat: Security update for the Linux kernel

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The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that a deadlock could occur in the Out of Memory (OOM) killer. A process could trigger this deadlock by consuming a large amount of memory, and then causing request_module() to be called. A local, unprivileged user could use this flaw to cause a denial of service (excessive memory consumption). A flaw was found in the way the KVM (Kernel-based Virtual Machine) subsystem handled guests attempting to run with the X86_CR4_OSXSAVE CPU feature flag set. On hosts without the XSAVE CPU feature, a local, unprivileged user could use this flaw to crash the host system. (The “grep –color xsave /proc/cpuinfo” command can be used to verify if your system has the XSAVE CPU feature.)

A memory disclosure flaw was found in the way the load_script() function in the binfmt_script binary format handler handled excessive recursions. A local, unprivileged user could use this flaw to leak kernel stack memory to user-space by executing specially-crafted scripts.

Updated packages are available from ftp.redhat.com.

February 15, 2013 16:09 Red Hat: Security update for MySQL

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MySQL is a multi-user, multi-threaded SQL database server. It consists of the MySQL server daemon (mysqld) and many client programs and libraries. This update fixes several vulnerabilities in the MySQL database server.

Updated packages are available from ftp.redhat.com.

February 15, 2013 16:01 Red Hat: Security update for libxml2

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These packages provide the libxml2 library, a development toolbox providing the implementation of various XML standards, for users of MinGW (Minimalist GNU for Windows). A heap-based buffer overflow flaw was found in the way libxml2 decoded entity references with long names. A remote attacker could provide a specially-crafted XML file that, when opened in an application linked against libxml2, would cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. A heap-based buffer underflow flaw was found in the way libxml2 decoded certain entities. A remote attacker could provide a specially-crafted XML file that, when opened in an application linked against libxml2, would cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application.

It was found that the hashing routine used by libxml2 arrays was susceptible to predictable hash collisions. Sending a specially-crafted message to an XML service could result in longer processing time, which could lead to a denial of service. To mitigate this issue, randomization has been added to the hashing function to reduce the chance of an attacker successfully causing intentional collisions. Multiple flaws were found in the way libxml2 parsed certain XPath (XML Path Language) expressions. If an attacker were able to supply a specially-crafted XML file to an application using libxml2, as well as an XPath expression for that application to run against the crafted file, it could cause the application to crash. Two heap-based buffer overflow flaws were found in the way libxml2 decoded certain XML files. A remote attacker could provide a specially-crafted XML file that, when opened in an application linked against libxml2, would cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application.

An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way libxml2 parsed certain XPath expressions. If an attacker were able to supply a specially-crafted XML file to an application using libxml2, as well as an XPath expression for that application to run against the crafted file, it could cause the application to crash or, possibly, execute arbitrary code. An out-of-bounds memory read flaw was found in libxml2. A remote attacker could provide a specially-crafted XML file that, when opened in an application linked against libxml2, would cause the application to crash.

Updated packages are available from ftp.redhat.com.

February 15, 2013 14:01 Red Hat: Security update for X11 video driver

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The xorg-x11-drv-qxl package provides an X11 video driver for the QEMU QXL video accelerator. A flaw was found in the way the host’s qemu-kvm qxl driver and the guest’s X.Org qxl driver interacted when a SPICE connection terminated. A user able to initiate a SPICE connection to a guest could use this flaw to make the guest temporarily unavailable or, potentially (if the sysctl kernel.softlockup_panic variable was set to “1” in the guest), crash the guest.

Updated packages are available from ftp.redhat.com.

February 13, 2013 08:19 Red Hat: Security update for FreeType

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FreeType is a free, high-quality, portable font engine that can open and manage font files. It also loads, hints, and renders individual glyphs efficiently. A flaw was found in the way the FreeType font rendering engine processed certain Glyph Bitmap Distribution Format (BDF) fonts. If a user loaded a specially-crafted font file with an application linked against FreeType, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application.

Updated packages are available from ftp.redhat.com.

February 13, 2013 08:18 Red Hat: Security update for ABRT

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ABRT (Automatic Bug Reporting Tool) is a tool to help users to detect defects in applications and to create a bug report with all the information needed by a maintainer to fix it. It was found that the /usr/libexec/abrt-action-install-debuginfo-to-abrt-cache tool did not sufficiently sanitize its environment variables. This could lead to Python modules being loaded and run from non-standard directories (such as /tmp/). A local attacker could use this flaw to escalate their privileges to that of the abrt user. A race condition was found in the way ABRT handled the directories used to store information about crashes. A local attacker with the privileges of the abrt user could use this flaw to perform a symbolic link attack, possibly allowing them to escalate their privileges to root.

Updated packages are available from ftp.redhat.com.

February 13, 2013 08:16 Red Hat: Security update for NSS

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Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-enabled client and server applications. It was found that a Certificate Authority (CA) mis-issued two intermediate certificates to customers. These certificates could be used to launch man-in-the-middle attacks. This update renders those certificates as untrusted. This covers all uses of the certificates, including SSL, S/MIME, and code signing.

Updated packages are available from ftp.redhat.com.

February 08, 2013 10:18 Red Hat: Security update for libvirt

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The libvirt library is a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remote management of virtualized systems. A flaw was found in the way libvirtd handled connection cleanup (when a connection was being closed) under certain error conditions. A remote attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd or, potentially, execute arbitrary code with the privileges of the root user.

Updated packages are available from ftp.redhat.com.

February 06, 2013 08:50 Red Hat: Security update for ipa

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Red Hat Identity Management is a centralized authentication, identity management and authorization solution for both traditional and cloud-based enterprise environments. A weakness was found in the way IPA clients communicated with IPA servers when initially attempting to join IPA domains. As there was no secure way to provide the IPA server’s Certificate Authority (CA) certificate to the client during a join, the IPA client enrollment process was susceptible to man-in-the-middle attacks. This flaw could allow an attacker to obtain access to the IPA server using the credentials provided by an IPA client, including administrative access to the entire domain if the join was performed using an administrator’s credentials.

Updated packages are available from ftp.redhat.com.

February 06, 2013 08:49 Red Hat: Security update for MySQL

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MySQL is a multi-user, multi-threaded SQL database server. It consists of the MySQL server daemon (mysqld) and many client programs and libraries. A stack-based buffer overflow flaw was found in the user permission checking code in MySQL. An authenticated database user could use this flaw to crash the mysqld daemon or, potentially, execute arbitrary code with the privileges of the user running the mysqld daemon. A flaw was found in the way MySQL calculated the key length when creating a sort order index for certain queries. An authenticated database user could use this flaw to crash the mysqld daemon.

Updated packages are available from ftp.redhat.com.

February 06, 2013 08:47 Red Hat: Security update for the Linux kernel

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The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the Xen hypervisor implementation did not perform range checking on the guest provided values in multiple hypercalls. A privileged guest user could use this flaw to trigger long loops, leading to a denial of service It was found that when running a 32-bit binary that uses a large number of shared libraries, one of the libraries would always be loaded at a predictable address in memory. An attacker could use this flaw to bypass the Address Space Layout Randomization (ASLR) security feature. A flaw was found in the way the Linux kernel’s IPv6 implementation handled overlapping, fragmented IPv6 packets. A remote attacker could potentially use this flaw to bypass protection mechanisms (such as a firewall or intrusion detection system (IDS)) when sending network packets to a target system.

Updated packages are available from ftp.redhat.com.

February 04, 2013 07:57 Red Hat: Security update for Vino

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Vino is a Virtual Network Computing (VNC) server for GNOME. It allows remote users to connect to a running GNOME session using VNC. It was found that Vino transmitted all clipboard activity on the system running Vino to all clients connected to port 5900, even those who had not authenticated. A remote attacker who is able to access port 5900 on a system running Vino could use this flaw to read clipboard data without authenticating. Two out-of-bounds memory read flaws were found in the way Vino processed client framebuffer requests in certain encodings. An authenticated client could use these flaws to send a specially-crafted request to Vino, causing it to crash.

In certain circumstances, the vino-preferences dialog box incorrectly indicated that Vino was only accessible from the local network. This could confuse a user into believing connections from external networks are not allowed (even when they are allowed). With this update, vino-preferences no longer displays connectivity and reachable information. There was no warning that Universal Plug and Play (UPnP) was used to open ports on a user’s network router when the “Configure network automatically to accept connections” option was enabled (it is disabled by default) in the Vino preferences. This update changes the option’s description to avoid the risk of a UPnP router configuration change without the user’s consent.

Updated packages are available from ftp.redhat.com.

January 25, 2013 09:16 Red Hat: Security update for flash-plugin

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The flash-plugin package contains a Mozilla Firefox compatible Adobe Flash Player web browser plug-in. This update fixes one vulnerability in Adobe Flash Player. This vulnerability is detailed in the Adobe Security bulletin APSB13-01, listed in the References section. Specially-crafted SWF content could cause flash-plugin to crash or, potentially, execute arbitrary code when a victim loads a page containing the malicious SWF content.

Updated packages are available from ftp.redhat.com.

January 25, 2013 09:11 Red Hat: Security update for Firefox

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Mozilla Firefox is an open source web browser. XULRunner provides the XUL Runtime environment for Mozilla Firefox. Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox. A flaw was found in the way Chrome Object Wrappers were implemented. Malicious content could be used to cause Firefox to execute arbitrary code via plug-ins installed in Firefox.

A flaw in the way Firefox displayed URL values in the address bar could allow a malicious site or user to perform a phishing attack. An information disclosure flaw was found in the way certain JavaScript functions were implemented in Firefox. An attacker could use this flaw to bypass Address Space Layout Randomization (ASLR) and other security restrictions.

Updated packages are available from ftp.redhat.com.

January 25, 2013 09:09 Red Hat: Security update for Thunderbird

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Mozilla Thunderbird is a standalone mail and newsgroup client. Several flaws were found in the processing of malformed content. Malicious content could cause Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running Thunderbird. A flaw was found in the way Chrome Object Wrappers were implemented. Malicious content could be used to cause Thunderbird to execute arbitrary code via plug-ins installed in Thunderbird.

A flaw in the way Thunderbird displayed URL values could allow malicious content or a user to perform a phishing attack. An information disclosure flaw was found in the way certain JavaScript functions were implemented in Thunderbird. An attacker could use this flaw to bypass Address Space Layout Randomization (ASLR) and other security restrictions.

Updated packages are available from ftp.redhat.com.

January 23, 2013 15:38 Red Hat: Security update for GIMP

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GIMP Toolkit (GTK+) is a multi-platform toolkit for creating graphical user interfaces. An integer overflow flaw was found in the X BitMap (XBM) image file loader in GTK+. A remote attacker could provide a specially-crafted XBM image file that, when opened in an application linked against GTK+ (such as Nautilus), would cause the application to crash.

Updated packages are available from ftp.redhat.com.

January 23, 2013 15:36 Red Hat: Security update for Apache

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The httpd packages contain the Apache HTTP Server (httpd), which is the namesake project of The Apache Software Foundation. Input sanitization flaws were found in the mod_negotiation module. A remote attacker able to upload or create files with arbitrary names in a directory that has the MultiViews options enabled, could use these flaws to conduct cross-site scripting and HTTP response splitting attacks against users visiting the site.

Updated packages are available from ftp.redhat.com.

January 23, 2013 15:34 Red Hat: Security update for Ruby

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Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. It was found that certain methods did not sanitize file names before passing them to lower layer routines in Ruby. If a Ruby application created files with names based on untrusted input, it could result in the creation of files with different names than expected.

Updated packages are available from ftp.redhat.com.

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