[SECURITY] [DLA 264-1] libmodule-signature-perl security update

Package : libmodule-signature-perl
Version : 0.63-1+squeeze2
CVE ID : CVE-2015-3406 CVE-2015-3407 CVE-2015-3408 CVE-2015-3409
Debian Bug : 783451

John Lightsey discovered multiple vulnerabilities in Module::Signature,
a Perl module to manipulate CPAN SIGNATURE files. The Common
Vulnerabilities and Exposures project identifies the following problems:

CVE-2015-3406

Module::Signature could parse the unsigned portion of the SIGNATURE
file as the signed portion due to incorrect handling of PGP signature
boundaries.

CVE-2015-3407

Module::Signature incorrectly handled files that are not listed in
the SIGNATURE file. This includes some files in the t/ directory
that would execute when tests are run.

CVE-2015-3408

Module::Signature used two argument open() calls to read the files
when generating checksums from the signed manifest. This allowed to
embed arbitrary shell commands into the SIGNATURE file that would be
executed during the signature verification process.

CVE-2015-3409

Module::Signature incorrectly handled module loading, allowing to
load modules from relative paths in @INC. A remote attacker
providing a malicious module could use this issue to execute
arbitrary code during signature verification.

For the squeeze distribution, these issues have been fixed in version
0.63-1+squeeze2 of libmodule-signature-perl. Please note that the
libtest-signature-perl package was also updated for compatibility with
the CVE-2015-3407 fix.

We recommend that you upgrade your libmodule-signature-perl and
libtest-signature-perl packages.
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