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CentOS Update for exim CESA-2011:0153 centos4 x86_64

Information

Severity

Severity

Medium

Family

Family

CentOS Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.9

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:M/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

10 years ago

Modified

Modified

3 years ago

Summary

The remote host is missing an update for the 'exim' package(s) announced via the referenced advisory.

Insight

Insight

Exim is a mail transport agent (MTA) developed at the University of Cambridge for use on UNIX systems connected to the Internet. A privilege escalation flaw was discovered in Exim. If an attacker were able to gain access to the 'exim' user, they could cause Exim to execute arbitrary commands as the root user. (CVE-2010-4345) This update adds a new configuration file, '/etc/exim/trusted-configs'. To prevent Exim from running arbitrary commands as root, Exim will now drop privileges when run with a configuration file not listed as trusted. This could break backwards compatibility with some Exim configurations, as the trusted-configs file only trusts '/etc/exim/exim.conf' and '/etc/exim/exim4.conf' by default. If you are using a configuration file not listed in the new trusted-configs file, you will need to add it manually. Additionally, Exim will no longer allow a user to execute exim as root with the -D command line option to override macro definitions. All macro definitions that require root permissions must now reside in a trusted configuration file. Users of Exim are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, the exim daemon will be restarted automatically.

Affected Software

Affected Software

exim on CentOS 4

Solution

Solution

Please install the updated packages.

Common Vulnerabilities and Exposures (CVE)