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Vulnerability Assessment Details

USN72-1 : perl vulnerabilities

Vulnerability Assessment Summary
perl vulnerabilities

Detailed Explanation for this Vulnerability Assessment

Summary :

These remote packages are missing security patches :
- libcgi-fast-perl
- libperl-dev
- libperl5.8
- perl
- perl-base
- perl-debug
- perl-doc
- perl-modules
- perl-suid

Description :

Two exploitable vulnerabilities involving setuid-enabled perl scripts
have been discovered. The package "perl-suid" provides a wrapper
around perl which permits to use setuid-root perl scripts, i.e.
user-callable Perl scripts which have full root rights.

Previous versions permited users to overwrite arbitrary files by
setting the PERLIO_DEBUG environment variable and calling an arbitrary
setuid-root perl script. The file that PERLIO_DEBUG points to was then
overwritten by Perl debug messages. This did not permit precise control
over the file content, but could destroy important data. PERLIO_DEBUG
is now ignored for setuid scripts. (CVE-2005-0155)

In addition, calling a setuid-root perl script with a very long path
caused a buffer overflow if PERLIO_DEBUG was set. This buffer overflow
could be exploited to execute arbitrary files with full root
rights. (CVE-2005-0156)

Solution :

Upgrade to :
- libcgi-fast-perl-5.8.4-2ubuntu0.3 (Ubuntu 4.10)
- libperl-dev-5.8.4-2ubuntu0.3 (Ubuntu 4.10)
- libperl5.8-5.8.4-2ubuntu0.3 (Ubuntu 4.10)
- perl-5.8.4-2ubuntu0.3 (Ubuntu 4.10)
- perl-base-5.8.4-2ubuntu0.3 (Ubuntu 4.10)
- perl-debug-5.8.4-2ubuntu0.3 (Ubuntu 4.10)
- perl-doc-5.8.4-2ubuntu0.3 (Ubuntu 4.10)
- perl-modules-5.8.4-2ubuntu0.3 (Ubuntu 4.10)
- perl-suid-5.8.4-2ubuntu0.3 (Ubuntu 4.10)

Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: Ubuntu Security Notice (C) 2005 Canonical, Inc. / NASL script (C) 2005 Michel Arboi

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