Debian Security Advisory

DSA-805-1 apache2 -- several vulnerabilities

Date Reported:
08 Sep 2005
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 316173, Bug 320048, Bug 320063, Bug 326435.
In the Bugtraq database (at SecurityFocus): BugTraq ID 14660.
In Mitre's CVE dictionary: CVE-2005-1268, CVE-2005-2088, CVE-2005-2700, CVE-2005-2728.
CERT's vulnerabilities, advisories and incident notes: VU#744929.
More information:

Several problems have been discovered in Apache2, the next generation, scalable, extendable web server. The Common Vulnerabilities and Exposures project identifies the following problems:

  • CAN-2005-1268

    Marc Stern discovered an off-by-one error in the mod_ssl Certificate Revocation List (CRL) verification callback. When Apache is configured to use a CRL this can be used to cause a denial of service.

  • CAN-2005-2088

    A vulnerability has been discovered in the Apache web server. When it is acting as an HTTP proxy, it allows remote attackers to poison the web cache, bypass web application firewall protection, and conduct cross-site scripting attacks, which causes Apache to incorrectly handle and forward the body of the request.

  • CAN-2005-2700

    A problem has been discovered in mod_ssl, which provides strong cryptography (HTTPS support) for Apache that allows remote attackers to bypass access restrictions.

  • CAN-2005-2728

    The byte-range filter in Apache 2.0 allows remote attackers to cause a denial of service via an HTTP header with a large Range field.

The old stable distribution (woody) does not contain Apache2 packages.

For the stable distribution (sarge) these problems have been fixed in version 2.0.54-5.

For the unstable distribution (sid) these problems have been fixed in version 2.0.54-5.

We recommend that you upgrade your apache2 packages.

Fixed in:

Debian GNU/Linux 3.1 (sarge)

Architecture-independent component:
Intel IA-32:
Intel IA-64:
Motorola 680x0:
Big endian MIPS:
Little endian MIPS:
IBM S/390:
Sun Sparc:

MD5 checksums of the listed files are available in the original advisory.