#VU6787 Null pointer dereference in ImageMagick - CVE-2017-6497

Vulnerability identifier: #VU6787

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-6497

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
ImageMagick
Client/Desktop applications / Multimedia software

Vendor: ImageMagick.org

Description
The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in psd.c source code file due to insufficient sanitization of user-supplied input. A local attacker can provide a specially crafted .psd file, trigger NULL pointer dereference and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ImageMagick: 6.9.6.6, 6.9.7-0

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External links
https://www.vuxml.org/freebsd/50776801-4183-11e7-b291-b499baebfeaf.html
https://github.com/ImageMagick/ImageMagick/commit/7f2dc7a1afc067d0c89f12c82bcdec0445fb1b94

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.