==========================================================================
Ubuntu Security Notice USN-5944-1
March 10, 2023

snakeyaml vulnerabilities
==========================================================================

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

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in SnakeYAML.

Software Description:
- snakeyaml: YAML parser and emitter for the Java programming language

Details:

It was discovered that SnakeYAML did not limit the maximal nested depth
for collections when parsing YAML data. If a user or automated system were
tricked into opening a specially crafted YAML file, an attacker could
possibly use this issue to cause applications using SnakeYAML to crash,
resulting in a denial of service. (CVE-2022-25857, CVE-2022-38749,
CVE-2022-38750)

It was discovered that SnakeYAML did not limit the maximal data matched
with regular expressions when parsing YAML data. If a user or automated
system were tricked into opening a specially crafted YAML file, an
attacker could possibly use this issue to cause applications using
SnakeYAML to crash, resulting in a denial of service. (CVE-2022-38751)

Update instructions:

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

Ubuntu 22.10:
   libyaml-snake-java              1.29-1ubuntu0.22.10.1

Ubuntu 22.04 LTS:
   libyaml-snake-java              1.29-1ubuntu0.22.04.1

Ubuntu 20.04 LTS:
   libyaml-snake-java              1.25+ds-2ubuntu0.1

Ubuntu 18.04 LTS:
   libyaml-snake-java              1.23-1+deb10u1build0.18.04.1

Ubuntu 16.04 ESM:
   libyaml-snake-java              1.12-2ubuntu0.16.04.1~esm1

Ubuntu 14.04 ESM:
   libyaml-snake-java              1.12-2ubuntu0.14.04.1~esm1

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

References:
   https://ubuntu.com/security/notices/USN-5944-1
   CVE-2022-25857, CVE-2022-38749, CVE-2022-38750, CVE-2022-38751

Package Information:
https://launchpad.net/ubuntu/+source/snakeyaml/1.29-1ubuntu0.22.10.1
https://launchpad.net/ubuntu/+source/snakeyaml/1.29-1ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/snakeyaml/1.25+ds-2ubuntu0.1
https://launchpad.net/ubuntu/+source/snakeyaml/1.23-1+deb10u1build0.18.04.1