Ubuntu 6.06 LTS / 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : exim4 vulnerabilities (USN-1060-1)

Ubuntu Security Notice (C) 2011-2014 Canonical, Inc. / NASL script (C) 2011-2014 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related patches.

Description :

It was discovered that Exim contained a design flaw in the way it
processed alternate configuration files. An attacker that obtained
privileges of the 'Debian-exim' user could use an alternate
configuration file to obtain root privileges. (CVE-2010-4345)

It was discovered that Exim incorrectly handled certain return values
when handling logging. An attacker that obtained privileges of the
'Debian-exim' user could use this flaw to obtain root privileges.
(CVE-2011-0017)

Dan Rosenberg discovered that Exim incorrectly handled writable
sticky-bit mail directories. If Exim were configured in this manner, a
local user could use this flaw to cause a denial of service or
possibly gain privileges. This issue only applied to Ubuntu 6.06 LTS,
8.04 LTS, 9.10, and 10.04 LTS. (CVE-2010-2023)

Dan Rosenberg discovered that Exim incorrectly handled MBX locking. If
Exim were configured in this manner, a local user could use this flaw
to cause a denial of service or possibly gain privileges. This issue
only applied to Ubuntu 6.06 LTS, 8.04 LTS, 9.10, and 10.04 LTS.
(CVE-2010-2024).

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 6.9
(CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.0
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 51954 ()

Bugtraq ID: 40451
40454
45341
46065

CVE ID: CVE-2010-2023
CVE-2010-2024
CVE-2010-4345
CVE-2011-0017