According to David Wagner, iDEFENSE and the Apache HTTP Server
Project, several remotely exploitable vulnerabilities have been found
in the Apache package, a commonly used webserver. These
vulnerabilities could allow an attacker to enact a denial of service
against a server or execute a cross scripting attack. The Common
Vulnerabilities and Exposures (CVE) project identified the following
1. CAN-2002-0839: A vulnerability exists on platforms using System V
shared memory based scoreboards. This vulnerability allows an
attacker who can execute under the Apache UID to exploit the Apache
shared memory scoreboard format and send a signal to any process as
root or cause a local denial of service attack.
2. CAN-2002-0840: Apache is susceptible to a cross site scripting
vulnerability in the default 404 page of any web server hosted on a
domain that allows wildcard DNS lookups.
3. CAN-2002-0843: There were some possible overflows in the utility
ApacheBench (ab) which could be exploited by a malicious server.
4. CAN-2002-1233: A race condition in the htpasswd and htdigest
program enables a malicious local user to read or even modify the
contents of a password file or easily create and overwrite files as
the user running the htpasswd (or htdigest respectively) program.
5. CAN-2001-0131: htpasswd and htdigest in Apache 2.0a9, 1.3.14, and
others allows local users to overwrite arbitrary files via a
This is the same vulnerability as CAN-2002-1233, which was fixed in
potato already but got lost later and was never applied upstream.
5. NO-CAN: Several buffer overflows have been found in the ApacheBench
(ab) utility that could be exploited by a remote server returning
very long strings.
These problems have been fixed in version 1.3.26-0woody3 for the
current stable distribution (woody) and in 1.3.9-14.3 for the old
stable distribution (potato). Corrected packages for the unstable
distribution (sid) are expected soon.
We recommend that you upgrade your Apache package immediately.
will fetch the file for you
dpkg -i file.deb
will install the referenced file.
If you are using the apt-get package manager, use the line for
sources.list as given below:
will update the internal database
will install corrected packages
You may use an automated update by adding the resources from the
footer to the proper configuration.
Debian GNU/Linux 2.2 alias potato