What’s Vulnerable › Vulnerabilities

CVE-2018-10855

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-07-03 · updated 2026-06-17
• Weakness: CWE-532

Description

Ansible 2.5 prior to 2.5.5, and 2.4 prior to 2.4.5, do not honor the no_log task flag for failed tasks. When the no_log flag has been used to protect sensitive data passed to a task from being logged, and that task does not run successfully, Ansible will expose sensitive data in log files and on the terminal of the user running Ansible.

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 19.04
• Debian Linux: 9.0
• RedHat Ansible Engine: from 2.4 before 2.4.5; from 2.5 (excl.) through 2.5.5; 2.0 — fixed in 2.4.5
• CloudForms: 4.6
• OpenStack: 13, 10, 12
• RedHat Virtualization: 4.0

How to fix

Upgrade to a fixed version: RedHat Ansible Engine 2.4.5. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHBA-2018:3788
• https://access.redhat.com/errata/RHSA-2018:1948
• https://access.redhat.com/errata/RHSA-2018:1949
• https://access.redhat.com/errata/RHSA-2018:2022
• https://access.redhat.com/errata/RHSA-2018:2079
• https://access.redhat.com/errata/RHSA-2018:2184
• https://access.redhat.com/errata/RHSA-2018:2585
• https://access.redhat.com/errata/RHSA-2019:0054
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10855
• https://usn.ubuntu.com/4072-1/
• https://www.debian.org/security/2019/dsa-4396
• https://access.redhat.com/errata/RHBA-2018:3788

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