Fedora 28 update for polkit

1) Improper authorization

EUVDB-ID: #VU13987

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1116

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information or cause DoS condition on the target system.

The vulnerability exists due to improper implementation of the polkit_backend_interactive_authority_check_authorization function in the polkitd daemon. A local attacker can test for authentication and trigger authentication of unrelated processes owned by other users to access sensitive information or cause the service to crash.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 28

polkit: before 0.115-1.fc28

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:polkit:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2018-fef8a691a6

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.