Resource management error in Apache HTTP Server

1) Resource management error

EUVDB-ID: #VU32851

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-3348

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary "error state" in the backend server) via a malformed HTTP request.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Apache HTTP Server: 2.2.0 - 2.2.20

External links

http://community.jboss.org/message/625307
http://httpd.apache.org/security/vulnerabilities_22.html#2.2.21
http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html
http://marc.info/?l=bugtraq&m=131731002122529&w=2
http://marc.info/?l=bugtraq&m=132033751509019&w=2
http://rhn.redhat.com/errata/RHSA-2012-0542.html
http://rhn.redhat.com/errata/RHSA-2012-0543.html
http://secunia.com/advisories/46013
http://support.apple.com/kb/HT5130
http://www.apache.org/dist/httpd/Announcement2.2.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:168
http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html
http://www.redhat.com/support/errata/RHSA-2011-1391.html
http://www.securityfocus.com/bid/49616
http://www.securitytracker.com/id?1026054
http://exchange.xforce.ibmcloud.com/vulnerabilities/69804
http://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b@%3Ccvs.httpd.apache.org%3E
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14941
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18154

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.