NULL pointer dereference in freetype (Alpine package)

1) NULL pointer dereference

EUVDB-ID: #VU12561

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-6942

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the Ins_GETVARIATION() function within ttinterp.c due to NULL pointer dereference. A remote attacker can trick the victim into opening a specially crafted font file and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

freetype (Alpine package): 2.7-r1

CPE2.3

• cpe:2.3:o:alpine:freetype_alpine_package:2.7-r1:*:*:*:*:alpine_linux:*:3.4

External links

https://git.alpinelinux.org/aports/commit/?id=161f787af144080e2c15d648750e8aae04447b19
https://git.alpinelinux.org/aports/commit/?id=5ec6e75b44adbf424ee1f49315682d9441e32889
https://git.alpinelinux.org/aports/commit/?id=7a7493c33286ca7e43c8171cd6fad02bd13574c8
https://git.alpinelinux.org/aports/commit/?id=89c7aef675e52f6296314b9c79c495732c7b5809

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.