==========================================================================
Ubuntu Security Notice USN-2607-1
May 12, 2015

libmodule-signature-perl vulnerabilities
==========================================================================

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

– Ubuntu 15.04
– Ubuntu 14.10
– Ubuntu 14.04 LTS
– Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in Module::Signature.

Software Description:
– libmodule-signature-perl: module to manipulate CPAN SIGNATURE files

Details:

John Lightsey discovered that Module::Signature incorrectly handled PGP
signature boundaries. A remote attacker could use this issue to trick
Module::Signature into parsing the unsigned portion of the SIGNATURE file
as the signed portion. (CVE-2015-3406)

John Lightsey discovered that Module::Signature incorrectly handled files
that were not listed in the SIGNATURE file. A remote attacker could use
this flaw to execute arbitrary code when tests were run. (CVE-2015-3407)

John Lightsey discovered that Module::Signature incorrectly handled
embedded shell commands in the SIGNATURE file. A remote attacker could use
this issue to execute arbitrary code during signature verification.
(CVE-2015-3408)

John Lightsey discovered that Module::Signature incorrectly handled module
loading. A remote attacker could use this issue to execute arbitrary code
during signature verification. (CVE-2015-3409)

Update instructions:

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

Ubuntu 15.04:
libmodule-signature-perl 0.73-1ubuntu0.15.04.1

Ubuntu 14.10:
libmodule-signature-perl 0.73-1ubuntu0.14.10.1

Ubuntu 14.04 LTS:
libmodule-signature-perl 0.73-1ubuntu0.14.04.1

Ubuntu 12.04 LTS:
libmodule-signature-perl 0.68-1ubuntu0.12.04.2

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

References:
http://www.ubuntu.com/usn/usn-2607-1
CVE-2015-3406, CVE-2015-3407, CVE-2015-3408, CVE-2015-3409

Package Information:

https://launchpad.net/ubuntu/+source/libmodule-signature-perl/0.73-1ubuntu0.15.04.1

https://launchpad.net/ubuntu/+source/libmodule-signature-perl/0.73-1ubuntu0.14.10.1

https://launchpad.net/ubuntu/+source/libmodule-signature-perl/0.73-1ubuntu0.14.04.1

https://launchpad.net/ubuntu/+source/libmodule-signature-perl/0.68-1ubuntu0.12.04.2

—–BEGIN PGP SIGNATURE—–
Version: GnuPG v1
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=Jn0l
—–END PGP SIGNATURE—–
—