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Ubuntu: New Perl packages fix security vulnerabilities

It was discovered that the Safe.pm Perl module incorrectly handled Safe::reval and Safe::rdo access restrictions. An attacker could use this flaw to bypass intended restrictions and possibly execute arbitrary code. It was discovered that the CGI.pm Perl module incorrectly handled certain MIME boundary strings. An attacker could use this flaw to inject arbitrary HTTP headers and perform HTTP response splitting and cross-site scripting attacks. It was discovered that the CGI.pm Perl module incorrectly handled newline characters. An attacker could use this flaw to inject arbitrary HTTP headers and perform HTTP response splitting and cross-site scripting attacks. It was discovered that the lc, lcfirst, uc, and ucfirst functions did not properly apply the taint attribute when processing tainted input. An attacker could use this flaw to bypass intended restrictions. Updated packages are available from security.ubuntu.com.

========================================================================== Ubuntu Security Notice USN-1129-1 May 03, 2011

perl vulnerabilities ==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.04 - Ubuntu 10.10 - Ubuntu 10.04 LTS - Ubuntu 8.04 LTS - Ubuntu 6.06 LTS

Summary:

An attacker could send crafted input to Perl and bypass intended restrictions.

Software Description: - perl: Larry Wall’s Practical Extraction and Report Language

Details:

It was discovered that the Safe.pm Perl module incorrectly handled Safe::reval and Safe::rdo access restrictions. An attacker could use this flaw to bypass intended restrictions and possibly execute arbitrary code. (CVE-2010-1168, CVE-2010-1447)

It was discovered that the CGI.pm Perl module incorrectly handled certain MIME boundary strings. An attacker could use this flaw to inject arbitrary HTTP headers and perform HTTP response splitting and cross-site scripting attacks. This issue only affected Ubuntu 6.06 LTS, 8.04 LTS, 10.04 LTS and 10.10. (CVE-2010-2761, CVE-2010-4411)

It was discovered that the CGI.pm Perl module incorrectly handled newline characters. An attacker could use this flaw to inject arbitrary HTTP headers and perform HTTP response splitting and cross-site scripting attacks. This issue only affected Ubuntu 6.06 LTS, 8.04 LTS, 10.04 LTS and 10.10. (CVE-2010-4410)

It was discovered that the lc, lcfirst, uc, and ucfirst functions did not properly apply the taint attribute when processing tainted input. An attacker could use this flaw to bypass intended restrictions. This issue only affected Ubuntu 8.04 LTS, 10.04 LTS and 10.10. (CVE-2011-1487)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 11.04: perl 5.10.1-17ubuntu4.1

Ubuntu 10.10: perl 5.10.1-12ubuntu2.1

Ubuntu 10.04 LTS: perl 5.10.1-8ubuntu2.1

Ubuntu 8.04 LTS: perl 5.8.8-12ubuntu0.5

Ubuntu 6.06 LTS: perl 5.8.7-10ubuntu1.3

In general, a standard system update will make all the necessary changes.

References: CVE-2010-1168, CVE-2010-1447, CVE-2010-2761, CVE-2010-4410, CVE-2010-4411, CVE-2011-1487

Package Information: https://launchpad.net/ubuntu/+source/perl/5.10.1-17ubuntu4.1 https://launchpad.net/ubuntu/+source/perl/5.10.1-12ubuntu2.1 https://launchpad.net/ubuntu/+source/perl/5.10.1-8ubuntu2.1 https://launchpad.net/ubuntu/+source/perl/5.8.8-12ubuntu0.5 https://launchpad.net/ubuntu/+source/perl/5.8.7-10ubuntu1.3

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