#VU59993 Improper Verification of Cryptographic Signature in rpm - CVE-2021-3521
Published: January 25, 2022 / Updated: August 2, 2023
Vulnerability identifier: #VU59993
Vulnerability risk: Medium
CVSSv4.0: 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
Vulnerable software:
rpm
rpm
Software vendor:
rpm-software-management
rpm-software-management
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.
Remediation
Install update from vendor's website.