medium
4.3
CWE
20
Advisory Published
CVE Published
Updated

CVE-2011-4317: Input Validation

First published: Wed Nov 23 2011(Updated: )

Additional problems were discovered in the httpd fix for <a href="https://access.redhat.com/security/cve/CVE-2011-3368">CVE-2011-3368</a> - a reverse proxy bypass flaw - tracked via <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED ERRATA - CVE-2011-3368 httpd: reverse web proxy vulnerability" href="show_bug.cgi?id=740045">bug #740045</a>. Upstream mailing list post identifies following request forms, which are not handled correctly: GET @localhost::8880 HTTP/1.0\r\n\r\n GET qualys:@qqq.qq.qualys.com HTTP/1.0\r\n\r\n Reference: <a href="http://thread.gmane.org/gmane.comp.apache.devel/46440">http://thread.gmane.org/gmane.comp.apache.devel/46440</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/httpd<2.2.22
2.2.22
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

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-4317?

    CVE-2011-4317 is considered a high severity vulnerability due to its potential for exploitation in reverse proxy configurations.

  • How do I fix CVE-2011-4317?

    To fix CVE-2011-4317, upgrade to a patched version of the Apache HTTP server that addresses this vulnerability.

  • What versions are affected by CVE-2011-4317?

    CVE-2011-4317 affects multiple versions of the Apache HTTP server including 1.3.x and 2.2.22.

  • What kind of attack can exploit CVE-2011-4317?

    CVE-2011-4317 can be exploited to perform reverse proxy bypass attacks, leading to unauthorized access.

  • Are there any known exploits for CVE-2011-4317?

    Yes, there are known exploits for CVE-2011-4317 that leverage the reverse proxy bypass vulnerability.

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