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Message-ID: <20150423054412.GA6935@lorien.valinor.li>
Date: Thu, 23 Apr 2015 07:44:12 +0200
From: Salvatore Bonaccorso <carnil@...ian.org>
To: oss-security@...ts.openwall.com
Cc: CVE Assignments MITRE <cve-assign@...re.org>
Subject: Re: CVE request: Module::Signature before 0.75 -
multiple vulnerabilities
Hi,
On Mon, Apr 06, 2015 at 11:52:09PM -0500, John Lightsey wrote:
> Hi there,
>
> A new version of Module::Signature, was released to fix multiple
> vulnerabilities. Module::Signature is used by most CPAN clients to
> validate PAUSE GPG signature files on the CPAN mirrors and GPG signature
> files inside individual Perl module tarballs.
>
> The changelog for the 0.75 version is here:
>
> https://metacpan.org/changes/distribution/Module-Signature
>
> This commit fixes three flaws:
>
> https://github.com/audreyt/module-signature/commit/8a9164596fa5952d4fbcde5aa1c7d1c7bc85372f
>
> - Module::Signature could be tricked into interpreting the unsigned
> portion of a SIGNATURE file as the signed portion due to faulty parsing
> of the PGP signature boundaries.
>
> - When verifying the contents of a CPAN module, Module::Signature
> ignored some files in the extracted tarball that were not listed in the
> signature file. This included some files in the t/ directory that would
> execute automatically during "make test"
>
> - When generating checksums from the signed manifest, Module::Signature
> used two argument open() calls to read the files. This allowed embedding
> arbitrary shell commands into the SIGNATURE file that would execute
> during the signature verification process.
>
> This commit fixes one more flaw:
>
> https://github.com/audreyt/module-signature/commit/c41e8885b862b9fce2719449bc9336f0bea658ef
>
> - Several modules were loaded at runtime inside the extracted module
> directory. Modules like Text::Diff are not guaranteed to be available on
> all platforms and could be added to a malicious module so that they
> would load from the '.' path in @INC.
Adding explicitly CVE assignment team from MITRE into the loop.
Regards,
Salvatore
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