Home/CVE/The mod_proxy module in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x before 2.2.18, when the Revision 1179239 p
CVE

CVE-2011-3639

The mod_proxy module in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x before 2.2.18, when the Revision 1179239 p

The mod_proxy module in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x before 2.2.18, when the Revision 1179239 patch is in place, does not properly interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches for configuration of a reverse proxy, which allows remote attackers to send requests to intranet servers by using the HTTP/0.9 protocol with a malformed URI containing an initial @ (at sign) character. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-3368.

MEDIUM · CVSS 4.3 EPSS 0.09764
Schedule remediation
  • EPSS percentile: top 7% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
Sigma rules0 YARA rules0

Weakness Classification

Affected Products & Versions

1
apache http serverall versions

Public Exploits & PoCs

1

Scoring & Timeline

4.3
MEDIUM · CVSS v2 (legacy) · secalert@redhat.com
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:M/Au:N/C:N/I:P/A:N
Published to NVD30 Nov 2011 · 04:05 AM

Vendor Advisories

2
rhsaRHSA-2012:0128Moderate
rhsaRHSA-2012:0323Moderate
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