RHEL 4 : exim (RHSA-2005:025)

critical Nessus Plugin ID 17165

Synopsis

The remote Red Hat host is missing one or more security updates for exim.

Description

The remote Redhat Enterprise Linux 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2005:025 advisory.

Exim is a mail transport agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

A buffer overflow was discovered in the spa_base64_to_bits function in Exim, as originally obtained from Samba code. If SPA authentication is enabled, a remote attacker may be able to exploit this vulnerability to execute arbitrary code as the 'exim' user. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0022 to this issue. Please note that SPA authentication is not enabled by default in Red Hat Enterprise Linux 4.

Buffer overflow flaws were discovered in the host_aton and dns_build_reverse functions in Exim. A local user can trigger these flaws by executing exim with carefully crafted command line arguments and may be able to gain the privileges of the 'exim' account. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0021 to this issue.

Users of Exim are advised to update to these erratum packages which contain backported patches to correct these issues.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues 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-2005:025.

Plugin Details

Severity: Critical

ID: 17165

File Name: redhat-RHSA-2005-025.nasl

Version: 1.25

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 2/22/2005

Updated: 11/4/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2005-0021

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: 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

Patch Publication Date: 2/15/2005

Vulnerability Publication Date: 5/2/2005

Reference Information

CVE: CVE-2005-0021, CVE-2005-0022

RHSA: 2005:025

Detections

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