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.
2011-11-30T04:05:58.437
2025-04-11T00:51:21.963
Deferred
CVSSv2: 4.3 (MEDIUM)
AV:N/AC:M/Au:N/C:N/I:P/A:N
8.6
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | apache | http_server | 2.0.11 | Yes |
| Application | apache | http_server | 2.0.12 | Yes |
| Application | apache | http_server | 2.0.13 | Yes |
| Application | apache | http_server | 2.0.14 | Yes |
| Application | apache | http_server | 2.0.15 | Yes |
| Application | apache | http_server | 2.0.16 | Yes |
| Application | apache | http_server | 2.0.17 | Yes |
| Application | apache | http_server | 2.0.18 | Yes |
| Application | apache | http_server | 2.0.19 | Yes |
| Application | apache | http_server | 2.0.20 | Yes |
| Application | apache | http_server | 2.0.21 | Yes |
| Application | apache | http_server | 2.0.22 | Yes |
| Application | apache | http_server | 2.0.23 | Yes |
| Application | apache | http_server | 2.0.24 | Yes |
| Application | apache | http_server | 2.0.25 | Yes |
| Application | apache | http_server | 2.0.26 | Yes |
| Application | apache | http_server | 2.0.27 | Yes |
| Application | apache | http_server | 2.0.28 | Yes |
| Application | apache | http_server | 2.0.29 | Yes |
| Application | apache | http_server | 2.0.30 | Yes |
| Application | apache | http_server | 2.0.31 | Yes |
| Application | apache | http_server | 2.0.32 | Yes |
| Application | apache | http_server | 2.0.33 | Yes |
| Application | apache | http_server | 2.0.34 | Yes |
| Application | apache | http_server | 2.0.35 | Yes |
| Application | apache | http_server | 2.0.36 | Yes |
| Application | apache | http_server | 2.0.37 | Yes |
| Application | apache | http_server | 2.0.38 | Yes |
| Application | apache | http_server | 2.0.39 | Yes |
| Application | apache | http_server | 2.0.40 | Yes |
| Application | apache | http_server | 2.0.41 | Yes |
| Application | apache | http_server | 2.0.42 | Yes |
| Application | apache | http_server | 2.0.43 | Yes |
| Application | apache | http_server | 2.0.44 | Yes |
| Application | apache | http_server | 2.0.45 | Yes |
| Application | apache | http_server | 2.0.46 | Yes |
| Application | apache | http_server | 2.0.47 | Yes |
| Application | apache | http_server | 2.0.48 | Yes |
| Application | apache | http_server | 2.0.49 | Yes |
| Application | apache | http_server | 2.0.50 | Yes |
| Application | apache | http_server | 2.0.51 | Yes |
| Application | apache | http_server | 2.0.52 | Yes |
| Application | apache | http_server | 2.0.53 | Yes |
| Application | apache | http_server | 2.0.54 | Yes |
| Application | apache | http_server | 2.0.55 | Yes |
| Application | apache | http_server | 2.0.56 | Yes |
| Application | apache | http_server | 2.0.57 | Yes |
| Application | apache | http_server | 2.0.58 | Yes |
| Application | apache | http_server | 2.0.59 | Yes |
| Application | apache | http_server | 2.0.61 | Yes |
| Application | apache | http_server | 2.0.63 | Yes |
| Application | apache | http_server | 2.2.0 | Yes |
| Application | apache | http_server | 2.2.1 | Yes |
| Application | apache | http_server | 2.2.2 | Yes |
| Application | apache | http_server | 2.2.3 | Yes |
| Application | apache | http_server | 2.2.4 | Yes |
| Application | apache | http_server | 2.2.6 | Yes |
| Application | apache | http_server | 2.2.8 | Yes |
| Application | apache | http_server | 2.2.9 | Yes |
| Application | apache | http_server | 2.2.10 | Yes |
| Application | apache | http_server | 2.2.11 | Yes |
| Application | apache | http_server | 2.2.12 | Yes |
| Application | apache | http_server | 2.2.13 | Yes |
| Application | apache | http_server | 2.2.14 | Yes |
| Application | apache | http_server | 2.2.15 | Yes |
| Application | apache | http_server | 2.2.16 | Yes |
| Application | apache | http_server | 2.2.17 | Yes |
| Application | apache | http_server2.0a1 | * | Yes |
| Application | apache | http_server2.0a2 | * | Yes |
| Application | apache | http_server2.0a3 | * | Yes |
| Application | apache | http_server2.0a4 | * | Yes |
| Application | apache | http_server2.0a5 | * | Yes |
| Application | apache | http_server2.0a6 | * | Yes |
| Application | apache | http_server2.0a7 | * | Yes |
| Application | apache | http_server2.0a8 | * | Yes |
| Application | apache | http_server2.0a9 | * | Yes |