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CVE-2021-20271

HIGHCVSS 7/10EPSS 0.83%

Last modified

CVE-2021-20271 is a high-severity vulnerability rated 7/10 on the CVSS scale. 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. EPSS estimates a 0.83% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7/10

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability
0.83%

52.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
RpmRpm>= 4.15.0, < 4.15.1.3—
RpmRpm>= 4.16.0, < 4.16.1.3—
RpmRpm4.15.0Alpha
RpmRpm4.16.0Alpha
RedhatEnterprise Linux8.0—
FedoraprojectFedora32—
FedoraprojectFedora33—
FedoraprojectFedora34—
StarwindsoftwareStarwind Virtual Sanv8Build14398

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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 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.
How severe is CVE-2021-20271?
CVE-2021-20271 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.83% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20271?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20271?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST