Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2011-3639

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
30/11/2011
Last modified:
11/04/2025

Description

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.

Impact

Vector 2.0
AV:N/AC:M/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0
4.30
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:apache:http_server:2.0.11:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.12:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.13:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.14:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.15:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.16:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.17:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.18:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.19:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.20:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.21:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.22:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.23:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.24:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.25:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools