This update fixes various security issues and some bugs in the SUSE Linux Enterprise 9 kernel. A crafted NFS write request might have caused a buffer overwrite, potentially causing a kernel crash. The
copy_to_user implementation might have leaked kernel memory depending on specific user buffer setups. The r8169 driver did not properly check the size of an Ethernet frame that exceeds the MTU, which allows remote attackers to cause a denial of service. A use-after-free vulnerability when
IPV6_RECVPKTINFO is set on a listening socket, allowed remote attackers to cause a denial of service. The vfs implementation did not prevent creation of a child dentry for a deleted (aka S_DEAD) directory, which allowed local users to cause a denial of service. The
nfs_lock function did not properly remove POSIX locks on files that are setgid without group-execute permission, which allows local users to cause a denial of service. The
do_coredump function did not change the UID of a core dump file if it exists before a root process creates a core dump in the same location, which might have allowed local users to obtain sensitive information. The Linux kernel did not always follow NFS automount “symlinks,” which allowed attackers to have an unknown impact. A stack-based buffer overflow in the hfs subsystem allowed remote attackers to have an unspecified impact. The
processcompl_compat function did not clear the transfer buffer before returning to userspace when a USB command fails, which might have made it easier for physically proximate attackers to obtain sensitive information (kernel memory). Updated packages are available from download.opensuse.org.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: kernel Announcement ID: SUSE-SA:2010:036 Date: Wed, 01 Sep 2010 11:00:00 +0000 Affected Products: SUSE SLES 9 Open Enterprise Server Novell Linux POS 9 Vulnerability Type: remote denial of service CVSS v2 Base Score: 7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C) SUSE Default Package: yes Cross-References: CVE-2007-6206, CVE-2007-6733, CVE-2008-0598 CVE-2008-3275, CVE-2009-1389, CVE-2009-4020 CVE-2009-4537, CVE-2010-0727, CVE-2010-1083 CVE-2010-1088, CVE-2010-1188, CVE-2010-2521 Content of This Advisory: 1) Security Vulnerability Resolved: Linux kernel security update Problem Description 2) Solution or Work-Around 3) Special Instructions and Notes 4) Package Location and Checksums 5) Pending Vulnerabilities, Solutions, and Work-Arounds: - See SUSE Security Summary Report 6) Authenticity Verification and Additional Information ______________________________________________________________________________ 1) Problem Description and Brief Discussion This update fixes various security issues and some bugs in the SUSE Linux Enterprise 9 kernel. Following security issues were fixed: CVE-2010-2521: A crafted NFS write request might have caused a buffer overwrite, potentially causing a kernel crash. CVE-2008-0598: The x86_64 copy_to_user implementation might have leaked kernel memory depending on specific user buffer setups. CVE-2009-4537: drivers/net/r8169.c in the r8169 driver in the Linux kernel did not properly check the size of an Ethernet frame that exceeds the MTU, which allows remote attackers to (1) cause a denial of service (temporary network outage) via a packet with a crafted size, in conjunction with certain packets containing A characters and certain packets containing E characters; or (2) cause a denial of service (system crash) via a packet with a crafted size, in conjunction with certain packets containing '\0' characters, related to the value of the status register and erroneous behavior associated with the RxMaxSize register. NOTE: this vulnerability exists because of an incorrect fix for CVE-2009-1389. CVE-2010-1188: Use-after-free vulnerability in net/ipv4/tcp_input.c in the Linux kernel 2.6 when IPV6_RECVPKTINFO is set on a listening socket, allowed remote attackers to cause a denial of service (kernel panic) via a SYN packet while the socket is in a listening (TCP_LISTEN) state, which is not properly handled causes the skb structure to be freed. CVE-2008-3275: The (1) real_lookup and (2) __lookup_hash functions in fs/namei.c in the vfs implementation in the Linux kernel did not prevent creation of a child dentry for a deleted (aka S_DEAD) directory, which allowed local users to cause a denial of service ("overflow" of the UBIFS orphan area) via a series of attempted file creations within deleted directories. CVE-2007-6733: The nfs_lock function in fs/nfs/file.c in the Linux kernel did not properly remove POSIX locks on files that are setgid without group-execute permission, which allows local users to cause a denial of service (BUG and system crash) by locking a file on an NFS filesystem and then changing this files permissions, a related issue to CVE-2010-0727. CVE-2007-6206: The do_coredump function in fs/exec.c in Linux kernel did not change the UID of a core dump file if it exists before a root process creates a core dump in the same location, which might have allowed local users to obtain sensitive information. CVE-2010-1088: fs/namei.c in the Linux kernel did not always follow NFS automount "symlinks," which allowed attackers to have an unknown impact, related to LOOKUP_FOLLOW. CVE-2009-4020: Stack-based buffer overflow in the hfs subsystem in the Linux kernel allowed remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c. CVE-2010-1083: The processcompl_compat function in drivers/usb/core/devio.c in Linux kernel did not clear the transfer buffer before returning to userspace when a USB command fails, which might have made it easier for physically proximate attackers to obtain sensitive information (kernel memory). 2) Solution or Work-Around There is no known workaround, please install the update packages. 3) Special Instructions and Notes Please reboot the machine after installing the update. 4) Package Location and Checksums The preferred method for installing security updates is to use the YaST Online Update (YOU) tool. YOU detects which updates are required and automatically performs the necessary steps to verify and install them. Alternatively, download the update packages for your distribution manually and verify their integrity by the methods listed in Section 6 of this announcement. Then install the packages using the command rpm -Fhv <file.rpm> to apply the update, replacing <file.rpm> with the filename of the downloaded RPM package. Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: SUSE CORE 9 for AMD64 and Intel EM64T http://download.novell.com/patch/finder/?keywords=b13b7c37b794913aaef1d239c08b31ab SUSE CORE 9 for IBM zSeries 64bit http://download.novell.com/patch/finder/?keywords=5d5bd50baa9a4fcb6b4fda8d7a3a79f3 SUSE CORE 9 for IBM S/390 31bit http://download.novell.com/patch/finder/?keywords=ec0907a749db912429f923a2bbfdcfff SUSE CORE 9 for IBM POWER http://download.novell.com/patch/finder/?keywords=dd0f13d71502c69174ee0008c6ae7a63 SUSE CORE 9 for Itanium Processor Family http://download.novell.com/patch/finder/?keywords=a3f3f41a042648ecf313d65b8ff974ac Novell Linux POS 9 http://download.novell.com/patch/finder/?keywords=46a94f2d03cb2089d641b6390867fd8a SUSE SLES 9 http://download.novell.com/patch/finder/?keywords=b13b7c37b794913aaef1d239c08b31ab http://download.novell.com/patch/finder/?keywords=5d5bd50baa9a4fcb6b4fda8d7a3a79f3 http://download.novell.com/patch/finder/?keywords=ec0907a749db912429f923a2bbfdcfff http://download.novell.com/patch/finder/?keywords=dd0f13d71502c69174ee0008c6ae7a63 http://download.novell.com/patch/finder/?keywords=a3f3f41a042648ecf313d65b8ff974ac http://download.novell.com/patch/finder/?keywords=46a94f2d03cb2089d641b6390867fd8a SUSE CORE 9 for x86 http://download.novell.com/patch/finder/?keywords=46a94f2d03cb2089d641b6390867fd8a Open Enterprise Server http://download.novell.com/patch/finder/?keywords=c14f8a2a7882052067244604d07964d9 http://download.novell.com/patch/finder/?keywords=e0b5a1783f742694f60bf1c4d1f86599 ______________________________________________________________________________ 5) Pending Vulnerabilities, Solutions, and Work-Arounds: - See SUSE Security Summary Report ______________________________________________________________________________ 6) Authenticity Verification and Additional Information - Announcement authenticity verification: SUSE security announcements are published via mailing lists and on Web sites. The authenticity and integrity of a SUSE security announcement is guaranteed by a cryptographic signature in each announcement. All SUSE security announcements are published with a valid signature. To verify the signature of the announcement, save it as text into a file and run the command gpg --verify <file> replacing <file> with the name of the file where you saved the announcement. The output for a valid signature looks like: gpg: Signature made <DATE> using RSA key ID 3D25D3D9 gpg: Good signature from "SuSE Security Team <email@example.com>" where <DATE> is replaced by the date the document was signed. If the security team's key is not contained in your key ring, you can import it from the first installation CD. To import the key, use the command gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc - Package authenticity verification: SUSE update packages are available on many mirror FTP servers all over the world. While this service is considered valuable and important to the free and open source software community, the authenticity and the integrity of a package needs to be verified to ensure that it has not been tampered with. The internal rpm package signatures provide an easy way to verify the authenticity of an RPM package. Use the command rpm -v --checksig <file.rpm> to verify the signature of the package, replacing <file.rpm> with the filename of the RPM package downloaded. The package is unmodified if it contains a valid signature from firstname.lastname@example.org with the key ID 9C800ACA. This key is automatically imported into the RPM database (on RPMv4-based distributions) and the gpg key ring of 'root' during installation. You can also find it on the first installation CD and at the end of this announcement. - SUSE runs two security mailing lists to which any interested party may subscribe: email@example.com - General Linux and SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an e-mail to <firstname.lastname@example.org>. email@example.com - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an e-mail to <firstname.lastname@example.org>. ===================================================================== SUSE's security contact is <email@example.com> or <firstname.lastname@example.org>. The <email@example.com> public key is listed below. ===================================================================== ______________________________________________________________________________ The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. In particular, the clear text signature should show proof of the authenticity of the text. SUSE Linux Products GmbH provides no warranties of any kind whatsoever with respect to the information contained in this security advisory. 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