Vulnerability identifier: #VU12144

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-1106

CWE-ID: CWE-287

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
PackageKit
Universal components / Libraries / Libraries used by multiple products

Vendor: Richard Hughes

Description
The vulnerability allows a local attacker to bypass security restrictions on the target system.

The weakness exists in the pk_transaction_authorize_actions_finished_cb function in the pk-transaction.c source code file due to improper authentication restrictions. A local attacker can bypass authentication and install signed packages on the system without authorization. 

Mitigation
Update to version 1.1.10.

Vulnerable software versions

PackageKit: 1.1.0 - 1.1.9

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External links
http://github.com/hughsie/PackageKit/commit/f176976e24e8c17b80eff222572275517c16bdad

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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.