#VU8643 Out-of-bounds read in GhostXPS - CVE-2017-9726

Vulnerability identifier: #VU8643

Vulnerability 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-2017-9726

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

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

Vendor: Artifex Software, Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to boundary error in Ins_MDRP function in base/ttinterp.c. A remote unauthenticated attacker can create a specially crafted document, trigger heap-based out-o-bounds memory read and perform a denial of service (DoS) attack.

Mitigation
Install update from GIT repository.
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=7755e67116e8973ee0e3b22d653df026a84fa01b

Vulnerable software versions

GhostXPS: 9.21

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External links
https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=7755e67116e8973ee0e3b22d653df026a84fa01b
https://bugs.ghostscript.com/show_bug.cgi?id=698055

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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.