A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package whose signature header was modified to cause RPM database corruption and execute code. The highest threat from this vulnerability is to data integrity confidentiality and system availability. — CVE-2021-20271

Summary

Advisory CVE-2021-20271. A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an attacker who can convince a… Vendor: Microsoft. Source: MSRC. Threat: high. CVSS 7. See the official…

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

Read the official source

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