Vulnerability identifier: #VU32708

Vulnerability risk: Medium

CVSSv3.1: 4.6 [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-2013-0338

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Tomcat
Server applications / Web servers

Vendor: Apache Foundation

Description

The vulnerability allows context-dependent attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (CPU and memory consumption) via an XML file containing an entity declaration with long replacement text and many references to this entity, aka "internal entity expansion" with linear complexity.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Apache Tomcat: 6.0.19

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External links
http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00002.html
http://lists.opensuse.org/opensuse-updates/2013-03/msg00112.html
http://lists.opensuse.org/opensuse-updates/2013-03/msg00114.html
http://marc.info/?l=bugtraq&m=142798889927587&w=2
http://secunia.com/advisories/52662
http://secunia.com/advisories/55568
http://www.debian.org/security/2013/dsa-2652
http://www.mandriva.com/security/advisories?name=MDVSA-2013:056
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
http://www.ubuntu.com/usn/USN-1782-1
http://bugzilla.redhat.com/show_bug.cgi?id=912400
http://git.gnome.org/browse/libxml2/commit/?id=23f05e0c33987d6605387b300c4be5da2120a7ab

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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