#VU6709 NULL pointer dereference in Ghostscript - CVE-2017-7207

Vulnerability identifier: #VU6709

Vulnerability risk: Medium

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

CVE-ID: CVE-2017-7207

CWE-ID: CWE-476

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 perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the mem_get_bits_rectangle() function in base/gdevmem.c in Ghostscript. A remote attacker can create a specially crafted PostScript file, pass it to the affected application and crash it.

Mitigation
Update to version 9.21.

Vulnerable software versions

Ghostscript: 9.20

---

External links
https://patchwork.openembedded.org/patch/139337/

---

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.