CVE-2021-20271
rpm: Signature checks bypass via corrupted rpm package
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · March 12, 2021
Updated · August 7, 2026
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.
Statement
To exploit this flaw, an attacker must either compromise an RPM repository or convince an administrator to install an untrusted RPM. It is strongly recommended to only use RPMs from trusted repositories.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.7CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE-345 · Insufficient Verification of Data Authenticity