#VU9813 Improper input validation in ImageMagick - CVE-2017-16546

Vulnerability identifier: #VU9813

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-16546

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ImageMagick
Client/Desktop applications / Multimedia software

Vendor: ImageMagick.org

Description
The vulnerability allows a remote attacker to obtain potentially sensitive information or cause DoS condition on the target system.

The weakness exists due to the ReadWPGImage function in coders/wpg.c does not properly validate the colormap index in a WPG palette. A remote attacker can provide a specially WPG file, trigger use of uninitialized data or invalid memory allocation 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: 7.0.7-9

---

External links
https://github.com/ImageMagick/ImageMagick/issues/851

---

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.