Nessus Plugin #14766

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

Family:

Gentoo Local Security Checks

Category:

infos

Copyright:

(C) 2004 Michel Arboi

Summary:

Apache 2, mod_dav: Multiple vulnerabilities

Version:

$Revision: 1.1 $

Cve_id:

CAN-2004-0747, CAN-2004-0748, CAN-2004-0751, CAN-2004-0786, CAN-2004-0809

Bugtraq_id:

-

Xrefs:

GLSA:200409-21

Description:

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 vulnerabilty 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.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0747
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0748
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0751
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0786
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0809


Solution:
All Apache 2 users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=net-www/apache-2.0.51"
# emerge ">=net-www/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"


Risk factor : Medium