Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU59993
Risk: Medium
CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3521
CWE-ID:
CWE-347 - Improper Verification of Cryptographic Signature
Exploit availability: No
DescriptionThe 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.
Install updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS SP1 - 20.03 LTS SP2
rpm-help: before 4.15.1-26
rpm-debuginfo: before 4.15.1-26
rpm-build: before 4.15.1-26
rpm-devel: before 4.15.1-26
rpm-debugsource: before 4.15.1-26
rpm-libs: before 4.15.1-26
python3-rpm: before 4.15.1-26
python2-rpm: before 4.15.1-26
rpm-plugin-systemd-inhibit: before 4.15.1-26
rpm: before 4.15.1-26
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1431
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.