openEuler update for polkit

1) Resource exhaustion

EUVDB-ID: #VU61268

Risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-4115

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to process file descriptor exhaustion in polkit. A local user can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP3

polkit-help: before 0.116-9

polkit-debugsource: before 0.116-9

polkit-devel: before 0.116-9

polkit-libs: before 0.116-9

polkit-debuginfo: before 0.116-9

polkit: before 0.116-9

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1572

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.