NULL pointer dereference in GraphicsMagick

1) NULL pointer dereference

EUVDB-ID: #VU33183

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-2016-7997

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The WPG format reader in GraphicsMagick 1.3.25 and earlier allows remote attackers to cause a denial of service (assertion failure and crash) via vectors related to a ReferenceBlob and a NULL pointer.

Mitigation

Install update from vendor's website.

Vulnerable software versions

GraphicsMagick: 1.3.8 - 1.3.25

CPE2.3

• cpe:2.3:a:graphicsmagick_group:graphicsmagick:1.3.8:*:*:*:*:*:*:*
• cpe:2.3:a:graphicsmagick_group:graphicsmagick:1.3.9:*:*:*:*:*:*:*
• cpe:2.3:a:graphicsmagick_group:graphicsmagick:1.3.10:*:*:*:*:*:*:*

External links

https://www.debian.org/security/2016/dsa-3746
https://www.openwall.com/lists/oss-security/2016/10/07/4
https://www.openwall.com/lists/oss-security/2016/10/08/5
https://www.securityfocus.com/bid/93467

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.