CVE-2011-4317

Public Exploit

Description

The mod_proxy module in the Apache HTTP Server 1.3.x through 1.3.42, 2.0.x through 2.0.64, and 2.2.x through 2.2.21, 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 via a malformed URI containing an @ (at sign) character and a : (colon) character in invalid positions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-3368.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 88.85% Top 5%
Vendor Advisory hp.com Vendor Advisory marc.info Vendor Advisory marc.info Vendor Advisory redhat.com Vendor Advisory apple.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory mandriva.com Vendor Advisory debian.org Vendor Advisory mandriva.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://community.qualys.com/blogs/securitylabs/2011/11/23/apache-reverse-proxy-bypass-issue exploit
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041 vendor advisory
http://marc.info/?l=bugtraq&m=134987041210674&w=2 vendor advisory
http://marc.info/?l=bugtraq&m=133294460209056&w=2 vendor advisory
http://rhn.redhat.com/errata/RHSA-2012-0128.html vendor advisory
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
https://bugzilla.redhat.com/show_bug.cgi?id=756483
http://thread.gmane.org/gmane.comp.apache.devel/46440 exploit
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html vendor advisory
http://support.apple.com/kb/HT5501
http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html
http://lists.opensuse.org/opensuse-updates/2013-02/msg00012.html vendor advisory
http://www.securitytracker.com/id?1026353 vdb entry
http://lists.opensuse.org/opensuse-updates/2013-02/msg00009.html vendor advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150 vendor advisory
http://secunia.com/advisories/48551 third party advisory
http://www.debian.org/security/2012/dsa-2405 vendor advisory
http://kb.juniper.net/JSA10585
http://www.mandriva.com/security/advisories?name=MDVSA-2012:003 vendor advisory
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r9b4b963760a3cb5a4a70c902f325c6c0337fe51d5b8570416f8f8729%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r05b5357d1f6bd106f41541ee7d87aafe3f5ea4dc3e9bde5ce09baff8%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r1d201e3da31a2c8aa870c8314623caef7debd74a13d0f25205e26f15%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E mailing list

Frequently Asked Questions

What is the severity of CVE-2011-4317?
CVE-2011-4317 has been scored as a medium severity vulnerability.
How to fix CVE-2011-4317?
To fix CVE-2011-4317, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-4317 being actively exploited in the wild?
It is possible that CVE-2011-4317 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~89% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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