#VU16577 Type confusion in Ghostscript - CVE-2018-19134

Vulnerability identifier: #VU16577

Vulnerability risk: High

CVSSv4.0: 8.9 [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:P/U:Amber]

CVE-ID: CVE-2018-19134

CWE-ID: CWE-843

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ghostscript
Universal components / Libraries / Libraries used by multiple products

Vendor: Artifex Software, Inc.

Description

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

The vulnerability exists due to missing type check in line 292 of zcolor.c. A remote unauthenticated attacker can trigger memory corruption and execute code using the "pipe" instruction.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Ghostscript: 5.50 - 9.25

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External links
https://git.ghostscript.com/?p=ghostpdl.git;a=blob;f=psi/zcolor.c;h=74b428801eda5c75d70cf55e88c407484b554527;hb=5a4fec2a34af925993192e197ab666fe542b79d3#l292

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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.