CVE-2021-21371

low-risk
Published 2021-03-10

Tenable for Jira Cloud is an open source project designed to pull Tenable.io vulnerability data, then generate Jira Tasks and sub-tasks based on the vulnerabilities' current state. It published in pypi as "tenable-jira-cloud". In tenable-jira-cloud before version 1.1.21, it is possible to run arbitrary commands through the yaml.load() method. This could allow an attacker with local access to the host to run arbitrary code by running the application with a specially crafted YAML configuration file. This is fixed in version 1.1.21 by using yaml.safe_load() instead of yaml.load().

Do I need to act?

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0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.0/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Jira Cloud

Affected Vendors

Tenable

References (8)

Patch https://github.com/tenable/integration-jira-cloud/commit/f8c2095fd529e664e7fa254...
Third Party Advisory https://github.com/tenable/integration-jira-cloud/security/advisories/GHSA-8278-...
Product https://pypi.org/project/tenable-jira-cloud/
Third Party Advisory https://pyyaml.docsforge.com/master/documentation/#loading-yaml
Patch https://github.com/tenable/integration-jira-cloud/commit/f8c2095fd529e664e7fa254...
Third Party Advisory https://github.com/tenable/integration-jira-cloud/security/advisories/GHSA-8278-...
Product https://pypi.org/project/tenable-jira-cloud/
Third Party Advisory https://pyyaml.docsforge.com/master/documentation/#loading-yaml
22
/ 100
low-risk
Severity 17/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal