Debian update for xorg-server

1) Privilege escalation

EUVDB-ID: #VU15538

Risk: Low

CVSSv3.1: 7.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2018-14665

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

Exploit availability: Yes

Description

The vulnerability allows a local user to gain elevated privileges on the target system.

The vulnerability exists due to improper handling of two command-line options, namely -logfile and -modulepath. A local user can specify a '-modulepath' argument with an insecure path to create, overwrite or delete any files with root privileges.

Mitigation

Update the affected package to version: 2:1.19.2-1+deb9u4

Vulnerable software versions

Debian Linux: All versions

External links

http://www.debian.org/security/2018/dsa-4328

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, a fully functional exploit for this vulnerability is available.