Code Injection in ghostscript (Alpine package)

1) Code Injection

EUVDB-ID: #VU15376

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-17961

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation that allows sandbox bypass via error handler setup vectors. A remote attacker can pass a specially crafted PostScript file to the affected application, inject and execute arbitrary code on the target system.

Note: this vulnerability exists due to insufficient patch for previously fixed Code injection vulnerability (CVE-2018-17183).

Mitigation

Install update from vendor's website.

Vulnerable software versions

ghostscript (Alpine package): 9.22-r0 - 9.25-r0

ghostscript (Alpine package):

External links

http://git.alpinelinux.org/aports/commit/?id=b0243d03648d68851d3b5edb68da29eaae5c9f0f
http://git.alpinelinux.org/aports/commit/?id=b38a11ee1f5109ffc2f67afa52903b9437dd4111
http://git.alpinelinux.org/aports/commit/?id=26eef1d272a38c562dbd29a5488fb5a5efaa903e
http://git.alpinelinux.org/aports/commit/?id=9ce86c9b20156dccf8608730175929399fa2ac9b
http://git.alpinelinux.org/aports/commit/?id=df196f013c1754a810980f06dba86c4f9e8d1cfe
http://git.alpinelinux.org/aports/commit/?id=38c2fab4c40672459821302e7eec434b602757b8
http://git.alpinelinux.org/aports/commit/?id=4a52a88813303a6f82eed629efa03380141dfb5b

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. However, proof of concept for this vulnerability is available.