Zero-day vulnerability in Subversion

Null pointer dereference

The vulnerability was discovered by Joe Schaefer.

Vulnerability details

Advisory: SB2011052602 - Denial of service in Apache Subversion

Vulnerable component: Subversion

CVE-ID: CVE-2011-1752

CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:F/RL:O/RC:C

CWE-ID: CWE-476 - NULL Pointer Dereference


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.