Resource management error in Apache HTTP Server

1) Resource management error

EUVDB-ID: #VU32851

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

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

CPE2.3

• cpe:2.3:a:apache_foundation:apache_http_server:2.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:apache_foundation:apache_http_server:2.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:apache_foundation:apache_http_server:2.2.3:*:*:*:*:*:*:*

External links

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