GLSA-200409-21 : Apache 2, mod_dav: Multiple vulnerabilities

Medium Nessus Plugin ID 14766


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


The remote host is affected by the vulnerability described in GLSA-200409-21 (Apache 2, mod_dav: Multiple vulnerabilities)

A potential infinite loop has been found in the input filter of mod_ssl (CAN-2004-0748) as well as a possible segmentation fault in the char_buffer_read function if reverse proxying to a SSL server is being used (CAN-2004-0751). Furthermore, mod_dav, as shipped in Apache httpd 2 or mod_dav 1.0.x for Apache 1.3, contains a NULL pointer dereference which can be triggered remotely (CAN-2004-0809). The third issue is an input validation error found in the IPv6 URI parsing routines within the apr-util library (CAN-2004-0786). Additionally a possible buffer overflow has been reported when expanding environment variables during the parsing of configuration files (CAN-2004-0747).
Impact :

A remote attacker could cause a Denial of Service either by aborting a SSL connection in a special way, resulting in CPU consumption, by exploiting the segmentation fault in mod_ssl or the mod_dav flaw. A remote attacker could also crash a httpd child process by sending a specially crafted URI.
The last vulnerability could be used by a local user to gain the privileges of a httpd child, if the server parses a carefully prepared .htaccess file.
Workaround :

There is no known workaround at this time.


All Apache 2 users should upgrade to the latest version:
# emerge sync # emerge -pv '>=www-servers/apache-2.0.51' # emerge '>=www-servers/apache-2.0.51' All mod_dav users should upgrade to the latest version:
# emerge sync # emerge -pv '>=net-www/mod_dav-1.0.3-r2' # emerge '>=net-www/mod_dav-1.0.3-r2'

See Also

Plugin Details

Severity: Medium

ID: 14766

File Name: gentoo_GLSA-200409-21.nasl

Version: 1.17

Type: local

Published: 2004/09/17

Updated: 2019/08/02

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Temporal Score: 3.9

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

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

Vulnerability Information

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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2004/09/16

Vulnerability Publication Date: 2004/09/02

Reference Information

CVE: CVE-2004-0747, CVE-2004-0748, CVE-2004-0751, CVE-2004-0786, CVE-2004-0809

GLSA: 200409-21