Privilege escalation in libxfont2 (Alpine package)

1) Privilege escalation

EUVDB-ID: #VU9524

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-16611

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

Exploit availability: No

Description

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

The weakness exists due to improper privileges control. A local attacker can open (but not read) files on the system as root, triggering tape rewinds, watchdogs, or similar mechanisms that can be triggered by opening files.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libxfont2 (Alpine package): 2.0.2-r0

CPE2.3

• cpe:2.3:a:alpine:libxfont2_alpine_package:2.0.2-r0:*:*:*:*:alpine_linux:*:3.6

External links

https://git.alpinelinux.org/aports/commit/?id=792056e07e4a0e50c61bd38e9db4be8e2e0e8ad9
https://git.alpinelinux.org/aports/commit/?id=7928d56debdce280e874e632504f073150da1ec7
https://git.alpinelinux.org/aports/commit/?id=5e436adb9a15a7ece3acb12ef620ff82f3177539
https://git.alpinelinux.org/aports/commit/?id=14f62de61c4d9b107ab11ee7997dfa18835d972e
https://git.alpinelinux.org/aports/commit/?id=3a5d73a697a454b9f9eff6839eaf76e0aee5878f
https://git.alpinelinux.org/aports/commit/?id=29a23c838d3d18bf8181ffd2707e1528e49993a6
https://git.alpinelinux.org/aports/commit/?id=2ff685890bc01e209f6c5bdfcfa8fcf135381c05

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.