CVE-2011-3639

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Summary

CVECVE-2011-3639
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2011-11-30 04:05:58 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 4.3 from [email protected]

AV:N/AC:M/Au:N/C:N/I:P/A:N

Problem Types: CWE-20 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:N/AC:M/Au:N/C:N/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Apache Http Server 2.0.11 All All All
Application Apache Http Server 2.0.12 All All All
Application Apache Http Server 2.0.13 All All All
Application Apache Http Server 2.0.14 All All All
Application Apache Http Server 2.0.15 All All All
Application Apache Http Server 2.0.16 All All All
Application Apache Http Server 2.0.17 All All All
Application Apache Http Server 2.0.18 All All All
Application Apache Http Server 2.0.19 All All All
Application Apache Http Server 2.0.20 All All All
Application Apache Http Server 2.0.21 All All All
Application Apache Http Server 2.0.22 All All All
Application Apache Http Server 2.0.23 All All All
Application Apache Http Server 2.0.24 All All All
Application Apache Http Server 2.0.25 All All All
Application Apache Http Server 2.0.26 All All All
Application Apache Http Server 2.0.27 All All All
Application Apache Http Server 2.0.28 All All All
Application Apache Http Server 2.0.29 All All All
Application Apache Http Server 2.0.30 All All All
Application Apache Http Server 2.0.31 All All All
Application Apache Http Server 2.0.32 All All All
Application Apache Http Server 2.0.33 All All All
Application Apache Http Server 2.0.34 All All All
Application Apache Http Server 2.0.35 All All All
Application Apache Http Server 2.0.36 All All All
Application Apache Http Server 2.0.37 All All All
Application Apache Http Server 2.0.38 All All All
Application Apache Http Server 2.0.39 All All All
Application Apache Http Server 2.0.40 All All All
Application Apache Http Server 2.0.41 All All All
Application Apache Http Server 2.0.42 All All All
Application Apache Http Server 2.0.43 All All All
Application Apache Http Server 2.0.44 All All All
Application Apache Http Server 2.0.45 All All All
Application Apache Http Server 2.0.46 All All All
Application Apache Http Server 2.0.47 All All All
Application Apache Http Server 2.0.48 All All All
Application Apache Http Server 2.0.49 All All All
Application Apache Http Server 2.0.50 All All All
Application Apache Http Server 2.0.51 All All All
Application Apache Http Server 2.0.52 All All All
Application Apache Http Server 2.0.53 All All All
Application Apache Http Server 2.0.54 All All All
Application Apache Http Server 2.0.55 All All All
Application Apache Http Server 2.0.56 All All All
Application Apache Http Server 2.0.57 All All All
Application Apache Http Server 2.0.58 All All All
Application Apache Http Server 2.0.59 All All All
Application Apache Http Server 2.0.61 All All All
Application Apache Http Server 2.0.63 All All All
Application Apache Http Server 2.2.0 All All All
Application Apache Http Server 2.2.1 All All All
Application Apache Http Server 2.2.10 All All All
Application Apache Http Server 2.2.11 All All All
Application Apache Http Server 2.2.12 All All All
Application Apache Http Server 2.2.13 All All All
Application Apache Http Server 2.2.14 All All All
Application Apache Http Server 2.2.15 All All All
Application Apache Http Server 2.2.16 All All All
Application Apache Http Server 2.2.17 All All All
Application Apache Http Server 2.2.2 All All All
Application Apache Http Server 2.2.3 All All All
Application Apache Http Server 2.2.4 All All All
Application Apache Http Server 2.2.6 All All All
Application Apache Http Server 2.2.8 All All All
Application Apache Http Server 2.2.9 All All All
Application Apache Http Server2.0a1 All All All All
Application Apache Http Server2.0a2 All All All All
Application Apache Http Server2.0a3 All All All All
Application Apache Http Server2.0a4 All All All All
Application Apache Http Server2.0a5 All All All All
Application Apache Http Server2.0a6 All All All All
Application Apache Http Server2.0a7 All All All All
Application Apache Http Server2.0a8 All All All All
Application Apache Http Server2.0a9 All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Debian -- Security Information -- DSA-2405-1 apache2 af854a3a-2127-422b-91ae-364da2661108 www.debian.org
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com
Bug 752080 – CVE-2011-3639 httpd: http 0.9 request bypass of the reverse proxy vulnerability CVE-2011-3368 fix af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
[Apache-SVN] Revision 1188745 af854a3a-2127-422b-91ae-364da2661108 svn.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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