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OpenAdvisories
Medium USN-7465-1 3 CVEs

mistral, python-mistral-lib vulnerabilities

Published Apr 28, 2025 · Updated Jun 25, 2026

Summary

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)

Fixed packages 3

ReleasePackageFixed in
Ubuntu · Pro 16.04 LTS Pro:16.04:LTS mistral 2.0.0-1ubuntu2+esm1
Ubuntu · Pro 18.04 LTS Pro:18.04:LTS mistral 6.0.0-0ubuntu1.1+esm1
Ubuntu · Pro 18.04 LTS Pro:18.04:LTS python-mistral-lib 0.4.0-0ubuntu1+esm1

Vulnerabilities 3

  • Medium 6.5

    OpenStack Mistral DoS

    A Denial of Service (DoS) condition is possible in OpenStack Mistral in versions up to and including 7.0.3. Submitting a specially crafted workflow definition YAML file containing nested anchors can lead to resource exhaustion culminating in a denial of servi…

  • Medium 5.9

    An information-exposure vulnerability was discovered where openstack-mistral's undercloud log files containing clear-te…

  • Low 3.1

    openstack-mistral Discloses the presence of arbitrary files within the filesystem

    A flaw was found in openstack-mistral. By manipulating the SSH private key filename, the std.ssh action can be used to disclose the presence of arbitrary files within the filesystem of the executor running the action. Since std.ssh private_key_filename can ta…

References

  • report
    https://ubuntu.com/security/CVE-2018-16848
  • report
    https://ubuntu.com/security/CVE-2018-16849
  • report
    https://ubuntu.com/security/CVE-2019-3866