CVE-2011-3639 describes a security bypass vulnerability in the mod_proxy module of Apache HTTP Server versions 2.0.x through 2.0.64 and 2.2.x before 2.2.18, specifically when a certain patch (Revision 1179239) is applied. This flaw, an incomplete fix for CVE-2011-3368, allows remote attackers to bypass reverse proxy configurations (RewriteRule and ProxyPassMatch) by sending malformed HTTP/0.9 requests with an initial '@' character in the URI, thereby accessing intranet servers. With a CVSS score of 4.3 (medium severity), this vulnerability has a network attack vector and medium attack complexity, potentially leading to information disclosure (partial impact) without requiring authentication. While there is no evidence of active exploitation or Metasploit/Nuclei modules, an exploit for Apache 2.2.15 mod_proxy exists on ExploitDB. The CVE has minimal community discussion and media coverage, indicating low public attention.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
2.0.11CPE matchmatch criteria | cpe:2.3:a:apache:http_server:2.0.11:*:*:*:*:*:*:* | ||
2.0.12CPE matchmatch criteria | cpe:2.3:a:apache:http_server:2.0.12:*:*:*:*:*:*:* | ||
2.0.13CPE matchmatch criteria | cpe:2.3:a:apache:http_server:2.0.13:*:*:*:*:*:*:* | ||
2.0.14CPE matchmatch criteria | cpe:2.3:a:apache:http_server:2.0.14:*:*:*:*:*:*:* | ||
2.0.15CPE matchmatch criteria | cpe:2.3:a:apache:http_server:2.0.15:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:M/Au:N/C:N/I:P/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.