OpenSUSE Linux update for systemd

1) Privilege escalation

EUVDB-ID: #VU5366

Risk: Medium

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2016-10156

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

The vulnerability allows a local user to obtain root privileges.

The vulnerability exists within the touch_file() function in "/src/basic/fs-util.c". A local user can use systemd timer functions to create world writable set user id (suid) files, owned by root user, and gain root privileges on vulnerable system.

Successful exploitation of the vulnerability may allow a local user to gain root privileges on vulnerable system.

Mitigation

Update the affected packages.

Vulnerable software versions

systemd: 228

CPE2.3

• cpe:2.3:a:freedesktop_org:systemd:228:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2017-01/msg00058.html

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.