Improper Verification of Cryptographic Signature in rpm - CVE-2021-3521
Published: January 25, 2022 / Updated: August 2, 2023
Vulnerability identifier: #VU59993
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-3521
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: rpm-software-management
Affected software:
rpm
rpm
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to an error in RPM's signature functionality, as RPM does not check the binding signature of subkeys before importing them. A remote attacker with ability to add malicious subkey to a legitimate public key can run malicious code on the system.
How to mitigate CVE-2021-3521
Install update from vendor's website.