Bug 276426 – <www-servers/apache-2.2.11-r1 [apache2_modules_proxy_http]: Reverse Proxy DoS (CVE-2009-1890)

• Status: RESOLVED FIXED
• Product: Gentoo Security

[Description Alex Legler (RETIRED) 2009-07-04 07:56:47 UTC]

From Secunia:

A vulnerability has been reported in the Apache mod_proxy module, which can be exploited by malicious people to potentially cause a DoS (Denial of Service).

An error exists in the mod_proxy module when functioning in reverse proxy mode. This can be exploited to consume large amounts of CPU in an affected proxy process via specially crafted proxy requests.

[Comment 1 Alex Legler (RETIRED) 2009-07-04 07:58:59 UTC]

Created attachment 196584 [details, diff]
apache-CVE-2009-1890.patch

Changeset as applied to trunk in upstream SVN, rev 790587.

[Comment 2 Benedikt Böhm (RETIRED) 2009-07-05 16:12:53 UTC]

patch added to 2.2.11-r1, stabilization should probably be done in a new bug, since multiple issues have been fixed with 2.2.11-r1

[Comment 3 Stefan Behte (RETIRED) 2009-07-05 16:35:20 UTC]

Thanks, stabilization handled in 276589.

[Comment 4 Alex Legler (RETIRED) 2009-07-10 16:35:50 UTC]

CVE-2009-1890 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-1890):
  The stream_reqbody_cl function in mod_proxy_http.c in the mod_proxy
  module in the Apache HTTP Server before 2.3.3, when a reverse proxy
  is configured, does not properly handle an amount of streamed data
  that exceeds the Content-Length value, which allows remote attackers
  to cause a denial of service (CPU consumption) via crafted requests.

[Comment 5 Alex Legler (RETIRED) 2009-07-12 15:23:43 UTC]

GLSA 200907-04, thanks everyone.