This security bulletin contains one medium risk vulnerability.
1) Improper Verification of Cryptographic Signature
EUVDB-ID: #VU59993
Risk: Medium
CVSSv3.1: 6.8 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:U/RC:C]
CVE-ID: CVE-2021-3521
CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature
Exploit availability: No
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.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versions
rpm: 4.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.1, 4.3.3, 4.4, 4.4.1, 4.4.2, 4.4.2.1, 4.4.2.1 rc1, 4.4.2.1 rc2, 4.4.2.1 rc3, 4.4.2.2, 4.4.2.2 rc1, 4.4.2.2 rc2, 4.4.2.3, 4.4.2.3 rc1, 4.5.90, 4.6.0, 4.6.0 rc1, 4.6.0 rc2, 4.6.0 rc3, 4.6.0 rc4, 4.6.1, 4.7.0, 4.7.0 beta1, 4.7.0 rc1, 4.7.1, 4.7.2, 4.8.0, 4.8.0 beta1, 4.8.1, 4.9.0, 4.9.0 beta1, 4.9.0 rc1, 4.9.1, 4.9.1.1, 4.9.1.2, 4.9.1.3, 4.10.0, 4.10.0 beta1, 4.10.1, 4.10.2, 4.10.3.1, 4.11.0, 4.11.0 alpha, 4.11.0 beta1, 4.11.0.1, 4.11.1, 4.11.1 rc1, 4.11.1 rc2, 4.11.2, 4.11.2 rc1, 4.11.2 rc2, 4.11.3, 4.12.0, 4.12.0 alpha, 4.12.0 beta1, 4.12.0 rc1, 4.12.0.1, 4.12.0.2, 4.13.0, 4.13.0 alpha, 4.13.0 rc1, 4.13.0 rc2, 4.13.0.1, 4.13.0.2, 4.13.0.3, 4.13.1, 4.14.0, 4.14.0 rc1, 4.14.0 rc2, 4.14.1, 4.14.2, 4.14.2 rc1, 4.14.2 rc2, 4.14.2.1, 4.14.3, 4.15.0, 4.15.0 alpha, 4.15.0 beta1, 4.15.0 rc1, 4.15.1, 4.15.1.3, 4.16.0, 4.16.0 alpha, 4.16.0 beta2, 4.16.0 beta3, 4.16.0 rc1, 4.16.1, 4.16.1.1, 4.16.1.2, 4.16.1.3, 4.17.0, 4.17.0 alpha, 4.17.0 beta1, 4.17.0 rc1
CPE2.3
External links
http://github.com/rpm-software-management/rpm/pull/1788http://bugzilla.redhat.com/show_bug.cgi?id=1941098
