[USN-7600-1] libxslt vulnerability

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Ubuntu Security Notice USN-7600-1
June 26, 2025

libxslt vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

libxslt could be made to expose sensitive information.

Software Description:
- libxslt: XSLT processing library

Details:

It was discovered that libxslt could be made to expose sensitive
information about address space layout. An attacker could possibly use this
issue to bypass Address Space Layout Randomization (ASLR) protections.

Update instructions:

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

Ubuntu 22.04 LTS
libxslt1.1 1.1.34-4ubuntu0.22.04.4
xsltproc 1.1.34-4ubuntu0.22.04.4

Ubuntu 20.04 LTS
libxslt1.1 1.1.34-4ubuntu0.20.04.3+esm1
Available with Ubuntu Pro
xsltproc 1.1.34-4ubuntu0.20.04.3+esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
libxslt1.1 1.1.29-5ubuntu0.3+esm1
Available with Ubuntu Pro
xsltproc 1.1.29-5ubuntu0.3+esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libxslt1.1 1.1.28-2.1ubuntu0.3+esm2
Available with Ubuntu Pro
xsltproc 1.1.28-2.1ubuntu0.3+esm2
Available with Ubuntu Pro

Ubuntu 14.04 LTS
libxslt1.1 1.1.28-2ubuntu0.2+esm3
Available with Ubuntu Pro
xsltproc 1.1.28-2ubuntu0.2+esm3
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-7600-1
CVE-2023-40403

Package Information:
https://launchpad.net/ubuntu/+source/libxslt/1.1.34-4ubuntu0.22.04.4