USN-2607-1: Module::Signature vulnerabilities
Ubuntu Security Notice USN-2607-1
12th May, 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 version:
- 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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.