#VU2933 Null pointer dereference in Subversion - CVE-2011-1752

Vulnerability identifier: #VU2933

Vulnerability risk: High

CVSSv4.0: 6.9 [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:A/U:Amber]

CVE-ID: CVE-2011-1752

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Subversion
Server applications / Frameworks for developing and running applications

Vendor: Apache Foundation

Description
The vulnerability allows a remote attacker to cause DoS conditions on the target system.

The weakness exists due to NULL pointer dereference in the mod_dav_svn module when processing baselined WebDAV resources. A remote attacker can create a specially crafted request, send it to the victim and cause the Subversion server to crash.

Successful exploitation of the vulnerability results in denial of service on the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation
Upgrade to the latest version of Apache Subversion (1.6.17 or later).

Vulnerable software versions

Subversion: 1.6.0 - 1.6.16

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External links
https://subversion.apache.org/security/CVE-2011-1752-advisory.txt

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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. However, a fully functional exploit for this vulnerability is available.