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Gentoo: 201310-01 Normal: Module-Signature Arbitrary Execution Issue

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Calendar Grey October 4, 2013
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The Module-Signature module for Perl has insufficient path checks, allowing a remote attacker to execute arbitrary Perl code.

Summary

The 'cpansign verify' command will automatically download keys and use them to check the signature of CPAN packages via the SIGNATURE file. If an attacker were to replace this (SHA1) with a special unknown cipher (e.g. 'Special') and were to include in the distribution a 'Digest/Special.pm', the code in this Perl module would be executed when 'cpansign -verify' is run.

Topics%20covered

Topics Covered

security advisory gentoo arbitrary execution normal severity module-signature

Resolution

All users of the Module-Signature Perl module should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot -v ">=dev-perl/Module-Signature-0.720.0"

References

[ 1 ] CVE-2013-2145 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2145

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201310-01
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: Perl Module-Signature module: Arbitrary code execution
Date: October 04, 2013
Bugs: #472428
ID: 201310-01

Topics%20covered

Topics Covered

security advisory gentoo arbitrary execution normal severity module-signature

Synopsis

The Module-Signature module for Perl has insufficient path checks, allowing a remote attacker to execute arbitrary Perl code.

Background

The Perl Module::Signature module adds signing capabilities to CPAN modules.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-perl/Module-Signature < 0.720.0 >= 0.720.0

Impact

===== A remote attacker could possibly execute arbitrary code with the privileges of the process.

Workaround

There is no known workaround at this time.