USN-7465-1: Mistral vulnerabilities

Publication date

28 April 2025

Overview

Several security issues were fixed in Mistral.


Packages

Details

It was discovered that Mistral incorrectly handled nested anchors in YAML
files. An attacker could possibly use this issue to cause a denial of
service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-16848)

Pierre Gaxatte discovered that Mistral incorrectly handled erroneous SSH
private key filename commands. An attacker could possibly use this issue to
expose sensitive information. (CVE-2018-16849)

It was discovered that Mistral incorrectly handled the permissions of
sensitive log files. An attacker could possibly use this issue to expose
sensitive information. This issue only affected Ubuntu 18.04 LTS.
(CVE-2019-3866)

It was discovered that Mistral incorrectly handled nested anchors in YAML
files. An attacker could possibly use this issue to cause a denial of
service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-16848)

Pierre Gaxatte discovered that Mistral incorrectly handled erroneous SSH
private key filename commands. An attacker could possibly use this issue to
expose sensitive information. (CVE-2018-16849)

It was discovered that Mistral incorrectly handled the permissions of
sensitive log files. An attacker could possibly use this issue to expose
sensitive information. This issue only affected Ubuntu 18.04 LTS.
(CVE-2019-3866)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic mistral-api –  6.0.0-0ubuntu1.1+esm1  
python-mistral –  6.0.0-0ubuntu1.1+esm1  
python-mistral-lib –  0.4.0-0ubuntu1+esm1  
16.04 xenial mistral-api –  2.0.0-1ubuntu2+esm1  
python-mistral –  2.0.0-1ubuntu2+esm1  

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