GLSA-200509-12 : Apache, mod_ssl: Multiple vulnerabilities

Critical Nessus Plugin ID 19811


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


The remote host is affected by the vulnerability described in GLSA-200509-12 (Apache, mod_ssl: Multiple vulnerabilities)

mod_ssl contains a security issue when 'SSLVerifyClient optional' is configured in the global virtual host configuration (CAN-2005-2700).
Also, Apache's httpd includes a PCRE library, which makes it vulnerable to an integer overflow (CAN-2005-2491).
Impact :

Under a specific configuration, mod_ssl does not properly enforce the client-based certificate authentication directive, 'SSLVerifyClient require', in a per-location context, which could be potentially used by a remote attacker to bypass some restrictions. By creating a specially crafted '.htaccess' file, a local attacker could possibly exploit Apache's vulnerability, which would result in a local privilege escalation.
Workaround :

There is no known workaround at this time.


All mod_ssl users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-www/mod_ssl-2.8.24' All Apache 2 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=www-servers/apache-2.0.54-r15'

See Also

Plugin Details

Severity: Critical

ID: 19811

File Name: gentoo_GLSA-200509-12.nasl

Version: 1.18

Type: local

Published: 2005/10/05

Updated: 2019/08/02

Dependencies: 12634

Risk Information

Risk Factor: Critical

CVSS v2.0

Base Score: 10

Temporal Score: 7.4

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:apache, p-cpe:/a:gentoo:linux:mod_ssl, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2005/09/19

Vulnerability Publication Date: 2005/08/20

Reference Information

CVE: CVE-2005-2491, CVE-2005-2700

BID: 14620

GLSA: 200509-12