CWE
20
Advisory Published
CVE Published
CVE Published
Updated

CVE-2011-3368: Input Validation

First published: Tue Sep 20 2011(Updated: )

RMDG partner and independent security consultancy, "Context Information Security" has made CPNI Response aware of a security vulnerability which could potentially allow an attacker to gain full internal access to a network from the internet. The technique exploits insecurely configured reverse web proxies to gain access to internal/DMZ systems. This attack is based on an Apache web server which is using "mod_rewrite" to proxy web requests internally. Other proxies may suffer from this issue. The vulnerability occurs if the Apache configuration file is configured like this: RewriteRule ^(.*) <a href="http://internalserver:80$1">http://internalserver:80$1</a> [P] As opposed to: RewriteRule ^(.*) <a href="http://internalserver:80/$1">http://internalserver:80/$1</a> [P] It is important for readers to review their reverse proxy configurations to ensure that the rewrite rules are securely configured and cannot be abused in such a way that they can be used to compromise internal systems.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Apache HTTP server=1.3.38
Apache HTTP server=1.3.23
Apache HTTP server=1.3.27
Apache HTTP server=1.3.10
Apache HTTP server=1.3.33
Apache HTTP server=1.3.8
Apache HTTP server=1.3.36
Apache HTTP server=1.3.16
Apache HTTP server=1.3.1
Apache HTTP server=1.3.25
Apache HTTP server=1.3.28
Apache HTTP server=1.3.19
Apache HTTP server=1.3.31
Apache HTTP server=1.3.68
Apache HTTP server=1.3.24
Apache HTTP server=1.3.5
Apache HTTP server=1.3.20
Apache HTTP server=1.3.35
Apache HTTP server=1.3.6
Apache HTTP server=1.3.2
Apache HTTP server=1.3.34
Apache HTTP server=1.3.4
Apache HTTP server=1.3.13
Apache HTTP server=1.3.39
Apache HTTP server=1.3.30
Apache HTTP server=1.3.18
Apache HTTP server=1.3.65
Apache HTTP server=1.3.0
Apache HTTP server=1.3
Apache HTTP server=1.3.12
Apache HTTP server=1.3.3
Apache HTTP server=1.3.17
Apache HTTP server=1.3.1.1
Apache HTTP server=1.3.26
Apache HTTP server=1.3.9
Apache HTTP server=1.3.32
Apache HTTP server=1.3.15
Apache HTTP server=1.3.14
Apache HTTP server=1.3.42
Apache HTTP server=1.3.29
Apache HTTP server=1.3.22
Apache HTTP server=1.3.37
Apache HTTP server=1.3.11
Apache HTTP server=1.3.7
Apache HTTP server=1.3.41
Apache HTTP server=2.0.42
Apache HTTP server=2.0.64
Apache HTTP server=2.0.58
Apache HTTP server=2.0.47
Apache HTTP server=2.0.56
Apache HTTP server=2.0.50
Apache HTTP server=2.0.35
Apache HTTP server=2.0.37
Apache HTTP server=2.0.55
Apache HTTP server=2.0.44
Apache HTTP server=2.0.39
Apache HTTP server=2.0.52
Apache HTTP server=2.0.53
Apache HTTP server=2.0.57
Apache HTTP server=2.0.51
Apache HTTP server=2.0.28-beta
Apache HTTP server=2.0.63
Apache HTTP server=2.0.41
Apache HTTP server=2.0.49
Apache HTTP server=2.0.9
Apache HTTP server=2.0.34-beta
Apache HTTP server=2.0.61
Apache HTTP server=2.0.32
Apache HTTP server=2.0.38
Apache HTTP server=2.0.48
Apache HTTP server=2.0.45
Apache HTTP server=2.0.40
Apache HTTP server=2.0.36
Apache HTTP server=2.0.46
Apache HTTP server=2.0.54
Apache HTTP server=2.0.43
Apache HTTP server=2.0.59
Apache HTTP server=2.0.28
Apache HTTP server=2.0
Apache HTTP server=2.0.32-beta
Apache HTTP server=2.0.60
Apache HTTP server=2.2.11
Apache HTTP server=2.2.0
Apache HTTP server=2.2.10
Apache HTTP server=2.2.13
Apache HTTP server=2.2.2
Apache HTTP server=2.2.4
Apache HTTP server=2.2.16
Apache HTTP server=2.2.21
Apache HTTP server=2.2.8
Apache HTTP server=2.2.14
Apache HTTP server=2.2.6
Apache HTTP server=2.2.19
Apache HTTP server=2.2.9
Apache HTTP server=2.2.18
Apache HTTP server=2.2.12
Apache HTTP server=2.2.3
Apache HTTP server=2.2.15
Apache HTTP server=2.2.20
Apache HTTP server=2.2.1
redhat/httpd<2.2.22
2.2.22
redhat/httpd<0:2.2.3-53.el5_7.3
0:2.2.3-53.el5_7.3
redhat/httpd<0:2.2.15-9.el6_1.3
0:2.2.15-9.el6_1.3
redhat/httpd<0:2.2.17-15.4.ep5.el5
0:2.2.17-15.4.ep5.el5
redhat/httpd<0:2.2.17-15.4.ep5.el6
0:2.2.17-15.4.ep5.el6

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