Improper input validation in ghostscript (Alpine package)

1) Improper input validation

EUVDB-ID: #VU14565

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-15908

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to the bypass of the -dSAFER option. A remote unauthenticated attacker can submit a specially crafted PostScript file, bypass .tempfile restrictions and write files on the targeted system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ghostscript (Alpine package): 8.70-r0 - 9.22-r0

ghostscript (Alpine package):

CPE2.3

• cpe:2.3:a:alpine:ghostscript_alpine_package:8.70-r0:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:a:alpine:ghostscript_alpine_package:9.04-r0:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:a:alpine:ghostscript_alpine_package:9.06-r0:*:*:*:*:alpine_linux:*:2.2
• cpe:2.3:a:alpine:ghostscript_alpine_package::*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=0c81d393f55e12aad1694ac3ee4ed2b865527f6f
https://git.alpinelinux.org/aports/commit/?id=5e753b12c86f19cc249a631482ee1a4a739e45aa
https://git.alpinelinux.org/aports/commit/?id=646b9a7b6b94e05cb166f6a084a22fe8f03264fb
https://git.alpinelinux.org/aports/commit/?id=c13758613f3110e14c2e9eda818406f235d996c1
https://git.alpinelinux.org/aports/commit/?id=dd646650fecf6b0d42ffc26eed4a6da53a6040e5

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.