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Unrated severityNVD Advisory· Published Nov 30, 2011· Updated Apr 29, 2026

CVE-2011-3639

CVE-2011-3639

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.

Affected products

76
  • Apache/HTTP Server67 versions
    cpe:2.3:a:apache:http_server:2.0.11:*:*:*:*:*:*:*+ 66 more
    • 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:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.26:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.27:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.28:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.29:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.30:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.31:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.32:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.33:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.34:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.35:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.36:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.37:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.38:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.39:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.40:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.41:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.42:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.43:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.44:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.45:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.46:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.47:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.48:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.49:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.50:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.51:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.52:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.53:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.54:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.55:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.56:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.57:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.58:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.59:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.61:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.0.63:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.10:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.11:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.12:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.13:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.14:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.15:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.16:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.17:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.3:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.4:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.6:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.8:*:*:*:*:*:*:*
    • cpe:2.3:a:apache:http_server:2.2.9:*:*:*:*:*:*:*
  • Apache/HTTP Server2.0a1
    cpe:2.3:a:apache:http_server2.0a1:*:*:*:*:*:*:*:*
  • Apache/HTTP Server2.0a2
    cpe:2.3:a:apache:http_server2.0a2:*:*:*:*:*:*:*:*
  • Apache/HTTP Server2.0a3
    cpe:2.3:a:apache:http_server2.0a3:*:*:*:*:*:*:*:*
  • Apache/HTTP Server2.0a4
    cpe:2.3:a:apache:http_server2.0a4:*:*:*:*:*:*:*:*
  • Apache/HTTP Server2.0a5
    cpe:2.3:a:apache:http_server2.0a5:*:*:*:*:*:*:*:*
  • Apache/HTTP Server2.0a6
    cpe:2.3:a:apache:http_server2.0a6:*:*:*:*:*:*:*:*
  • Apache/HTTP Server2.0a7
    cpe:2.3:a:apache:http_server2.0a7:*:*:*:*:*:*:*:*
  • Apache/HTTP Server2.0a8
    cpe:2.3:a:apache:http_server2.0a8:*:*:*:*:*:*:*:*
  • Apache/HTTP Server2.0a9
    cpe:2.3:a:apache:http_server2.0a9:*:*:*:*:*:*:*:*

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

4

News mentions

0

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