openEuler 20.03 LTS SP1 update for libdnf

1) Improper Verification of Cryptographic Signature

EUVDB-ID: #VU54480

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3445

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 insufficient verification of cryptographic signature in libdnf. A remote attacker can create a specially crafted RPM package with altered header information, trick the victim into installing it and compromise the affected system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

python2-hawkey: before 0.48.0-2

libdnf-debugsource: before 0.48.0-2

python3-libdnf: before 0.48.0-2

libdnf-debuginfo: before 0.48.0-2

python2-libdnf: before 0.48.0-2

libdnf-devel: before 0.48.0-2

python3-hawkey: before 0.48.0-2

libdnf: before 0.48.0-2

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1224

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.