[Secure-testing-team] Bug#674715: CVE-2012-2653: initgroups() adds gid 0 to the group list

[Yves-Alexis Perez]

Package: arpwatch
Version: 2.1a15-1.1
Severity: critical
Tags: security
Justification: root security hole

Hi,

as reported on oss-sec
(http://www.openwall.com/lists/oss-security/2012/05/24/12) the patch
added to arpwatch to drop privileges in fact adds the gid 0 (root) group
to the group list. This has been allocated CVE-2012-2653.

Can you prepare updates fixing this (using pw->pw_gid in the call) or
should the security team do it?

Regards,
-- 
Yves-Alexis

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-2-grsec-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
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