Vulnerability identifier: #VU20837

Vulnerability risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-15718

CWE-ID: CWE-276

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
systemd
Server applications / Other server solutions

Vendor: Freedesktop.org

Description

The vulnerability allows a local user to change DNS settings.

The vulnerability exists due to the systemd-resolved D-Bus interface does not enforce appropriate access controls. A local unprivileged user can modify DNS resolver settings.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

systemd: 237 - 242

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External links
http://github.com/systemd/systemd/pull/13457/commits/35e528018f315798d3bffcb592b32a0d8f5162bd
http://github.com/systemd/systemd/pull/13457
http://www.openwall.com/lists/oss-security/2019/09/03/1

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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.