Security Bulletin: Vulnerability in PyYAML affects IBM Spectrum Protect Plus Container and Microsoft File Systems Agents (CVE-2020-1747)

Security Bulletin

Summary

There is a vulnerability in PyYAML that could allow a remote attacker to execute arbitrary code on the system. This vulnerability may affect the IBM Spectrum Protect Plus Container agent for Kubernetes and the IBM Spectrum Protect Plus Microsoft® Windows File Systems agent.

Vulnerability Details

CVEID: CVE-2020-1747
DESCRIPTION: PyYAML could allow a remote attacker to execute arbitrary code on the system, caused by an error when processing untrusted YAML files through the full_load method or with the FullLoader loader. By abusing the python/object/new constructor, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 9.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/178416 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM Spectrum Protect Plus Container Agent for Kubernetes (Linux)	10.1.5-10.1.6
IBM Spectrum Protect Plus Microsoft File Systems Agent (Windows)	10.1.6

Remediation/Fixes

Spectrum Protect Plus Release	First Fixing VRM Level	Platform	Link to Fix
10.1	10.1.7	Linux Windows	https://www.ibm.com/support/pages/node/6330495

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

Change History

02 December 2020: Initial Publication; 03 December 2020: Updated to remove Container agent for OpenShift as it is not affected.

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Tips

Security Bulletin: Vulnerability in PyYAML affects IBM Spectrum Protect Plus Container and Microsoft File Systems Agents (CVE-2020-1747)