Apache Subversion up to 1.11.0 mod_dav_svn Directory null pointer dereference

Summaryinfo

A vulnerability was found in Apache Subversion 1.10.0/1.10.1/1.10.2/1.10.3/1.11.0. It has been rated as problematic. This vulnerability affects unknown code of the component mod_dav_svn. The manipulation as part of Directory leads to null pointer dereference. This vulnerability is traded as CVE-2018-11803. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Apache Subversion 1.10.0/1.10.1/1.10.2/1.10.3/1.11.0 (Versioning Software). This issue affects an unknown function of the component mod_dav_svn. The manipulation as part of a Directory leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

Subversion's mod_dav_svn Apache HTTPD module versions 1.11.0 and 1.10.0 to 1.10.3 will crash after dereferencing an uninitialized pointer if the client omits the root path in a recursive directory listing operation.

The bug was discovered 01/22/2019. The weakness was shared 02/05/2019 (Website). The advisory is shared at lists.apache.org. The identification of this vulnerability is CVE-2018-11803 since 06/05/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 121465 (SUSE SLED15 / SLES15 Security Update : subversion (SUSE-SU-2019:0195-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 172064 (OpenSUSE Security Update for subversion (openSUSE-SU-2019:0153-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (121465). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Versioning Software

Vendor

• Apache

Name

• Subversion

Version

• 1.10.0
• 1.10.1
• 1.10.2
• 1.10.3
• 1.11.0

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion