==========================================================================
Ubuntu Security Notice USN-6590-1
January 18, 2024

xerces-c vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in Xerces-C++.

Software Description:
- xerces-c: Validating XML parser written in a portable subset of C++

Details:

It was discovered that Xerces-C++ was not properly handling memory
management operations when parsing XML data containing external DTDs,
which could trigger a use-after-free error. If a user or automated system
were tricked into processing a specially crafted XML document, an attacker
could possibly use this issue to cause a denial of service or execute
arbitrary code. This issue only affected Ubuntu 22.04 LTS. (CVE-2018-1311)

It was discovered that Xerces-C++ was not properly performing bounds
checks when processing XML Schema Definition files, which could lead to an
out-of-bounds access via an HTTP request. If a user or automated system
were tricked into processing a specially crafted XSD file, a remote
attacker could possibly use this issue to cause a denial of service.
(CVE-2023-37536)

Update instructions:

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

Ubuntu 22.04 LTS:
libxerces-c-samples 3.2.3+debian-3ubuntu0.1
libxerces-c3.2 3.2.3+debian-3ubuntu0.1

Ubuntu 20.04 LTS:
libxerces-c-samples 3.2.2+debian-1ubuntu0.2
libxerces-c3.2 3.2.2+debian-1ubuntu0.2

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
libxerces-c-samples 3.2.0+debian-2ubuntu0.1~esm3
libxerces-c3.2 3.2.0+debian-2ubuntu0.1~esm3

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
libxerces-c-samples 3.1.3+debian-1ubuntu0.1~esm3
libxerces-c3.1 3.1.3+debian-1ubuntu0.1~esm3

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
libxerces-c-samples 3.1.1-5.1+deb8u4ubuntu0.1~esm2
libxerces-c3.1 3.1.1-5.1+deb8u4ubuntu0.1~esm2

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

References:
https://ubuntu.com/security/notices/USN-6590-1
CVE-2018-1311, CVE-2023-37536

Package Information:
https://launchpad.net/ubuntu/+source/xerces-c/3.2.3+debian-3ubuntu0.1
https://launchpad.net/ubuntu/+source/xerces-c/3.2.2+debian-1ubuntu0.2