A Subversion security update has been released for Ubuntu Linux 18.04 LTS and 20.04 LTS.

USN-5445-1: Subversion vulnerabilities

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Ubuntu Security Notice USN-5445-1
May 26, 2022

subversion vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in subversion.

Software Description:
- subversion: Advanced version control system

Details:

Ace Olszowka discovered that Subversion incorrectly handled certain
svnserve requests. A remote attacker could possibly use this issue to cause
svnserver to crash, resulting in a denial of service. This issue only
affected Ubuntu 18.04 LTS. (CVE-2018-11782)

Tomas Bortoli discovered that Subversion incorrectly handled certain
svnserve requests. A remote attacker could possibly use this issue to cause
svnserver to crash, resulting in a denial of service. This issue only
affected Ubuntu 18.04 LTS. (CVE-2019-0203)

Thomas Åkesson discovered that Subversion incorrectly handled certain
inputs. An attacker could possibly use this issue to cause a denial of
service. (CVE-2020-17525)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
libapache2-mod-svn 1.13.0-3ubuntu0.2
libsvn1 1.13.0-3ubuntu0.2
subversion 1.13.0-3ubuntu0.2

Ubuntu 18.04 LTS:
libapache2-mod-svn 1.9.7-4ubuntu1.1
libsvn1 1.9.7-4ubuntu1.1
subversion 1.9.7-4ubuntu1.1

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5445-1
CVE-2018-11782, CVE-2019-0203, CVE-2020-17525

Package Information:
  https://launchpad.net/ubuntu/+source/subversion/1.13.0-3ubuntu0.2
  https://launchpad.net/ubuntu/+source/subversion/1.9.7-4ubuntu1.1