CVE-2020-17525 vulnerability in Apache and Other Products
Published on March 17, 2021

Remote unauthenticated denial-of-service in Subversion mod_authz_svn

Subversion's mod_authz_svn module will crash if the server is using in-repository authz rules with the AuthzSVNReposRelativeAccessFile option and a client sends a request for a non-existing repository URL. This can lead to disruption for users of the service. This issue was fixed in mod_dav_svn+mod_authz_svn servers 1.14.1 and mod_dav_svn+mod_authz_svn servers 1.10.7

NVD

Weakness Type

NULL Pointer Dereference

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. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.

Products Associated with CVE-2020-17525

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2020-17525 are published in these products:

Apache Subversion

Debian Linux

Canonical Ubuntu Linux

Affected Versions

Apache Software Foundation Apache Subversion:

Version mod_authz_svn 1.10.7 is unaffected.
Version mod_authz_svn and below 1.14.1 is affected.

Exploit Probability

EPSS

11.75%

Percentile

93.68%