CVE-2011-4317

medium Apache
CVSS v3 Base Score
4.3
AV:N/AC:M/Au:N/C:N/I:P/A:N
EPSS Score
81.9%
Exploitation probability in 30 days
Top 1% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
M
Confidentiality
None
Integrity
P
Availability
None
Published: November 30, 2011 (5279 days ago)
Last Modified: April 29, 2026
Vendor: Apache
Source: NVD

Description

The mod_proxy module in the Apache HTTP Server 1.3.x through 1.3.42, 2.0.x through 2.0.64, and 2.2.x through 2.2.21, 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 via a malformed URI containing an @ (at sign) character and a : (colon) character in invalid positions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-3368.

CWE

CWE-20

Affected Products

apache http server

References

🔗 h20000.www2.hp.com 🔗 kb.juniper.net 🔗 lists.apple.com 🔗 lists.opensuse.org 🔗 lists.opensuse.org