Command Injection in ghostscript (Alpine package)

1) Command Injection

EUVDB-ID: #VU17230

Risk: Low

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-6116

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the target system.

The vulnerability exists due to leak of sensitive operators on the operand stack when a pseudo-operator pushes a subroutine. A remote unauthenticated attacker can supply a specially crafted PostScript file to escape the -dSAFER protection, gain access to the file system and execute arbitrary commands.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ghostscript (Alpine package): 8.70-r0 - 9.26-r0

ghostscript (Alpine package):

CPE2.3

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

External links

https://git.alpinelinux.org/aports/commit/?id=2f2e944c59506de171bbed19cfe38f0ceaea6206
https://git.alpinelinux.org/aports/commit/?id=44af29fb2c660017489dc72ab3c6712fab60055c
https://git.alpinelinux.org/aports/commit/?id=8a3efd9a5b28fc17dc6dd75b46cac43cfd1b21bc
https://git.alpinelinux.org/aports/commit/?id=9096cb46474180811d360209f21d51206ce31580
https://git.alpinelinux.org/aports/commit/?id=b1c96f0abd38a7ca7a038f9b86dc0534d9d7d3bd

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.