Detections
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RHEL 4 / 5 : exim (RHSA-2011:0153)
high Nessus Plugin ID 51562
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Synopsis
The remote Red Hat host is missing a security update for exim.Description
The remote Redhat Enterprise Linux 4 / 5 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2011:0153 advisory.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.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the RHEL exim package based on the guidance in RHSA-2011:0153.See Also
http://www.nessus.org/u?13816b3f
https://access.redhat.com/security/updates/classification/#moderate
Plugin Details
Severity: High
ID: 51562
File Name: redhat-RHSA-2011-0153.nasl
Version: 1.23
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 1/18/2011
Updated: 11/4/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Critical
Score: 9.0
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 6.9
Temporal Score: 5.7
Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2010-4345
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7.2
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:redhat:enterprise_linux:5, p-cpe:/a:redhat:enterprise_linux:exim, cpe:/o:redhat:enterprise_linux:4, p-cpe:/a:redhat:enterprise_linux:exim-doc, p-cpe:/a:redhat:enterprise_linux:exim-sa, p-cpe:/a:redhat:enterprise_linux:exim-mon
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 1/17/2011
Vulnerability Publication Date: 12/14/2010
CISA Known Exploited Vulnerability Due Dates: 4/15/2022
Exploitable With
Metasploit (Exim4 string_format Function Heap Buffer Overflow)
Reference Information
CVE: CVE-2010-4345
BID: 45341