#VU32122 Division by zero in LibTIFF - CVE-2017-7595

Vulnerability identifier: #VU32122

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-7595

CWE-ID: CWE-369

Exploitation vector: Local

Exploit availability: No

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

Vendor: LibTIFF

Description

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

The vulnerability exists due to divide-by-zero error within The JPEGSetupEncode function in tiff_jpeg.c in LibTIFF 4.0.7. A remote attacker can perform a denial of service (divide-by-zero error and application crash) via a crafted image.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

LibTIFF: 1:6.0p1-4+deb7u4

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External links
https://www.debian.org/security/2017/dsa-3844
https://www.securityfocus.com/bid/97501
https://blogs.gentoo.org/ago/2017/04/01/libtiff-divide-by-zero-in-jpegsetupencode-tiff_jpeg-c
https://security.gentoo.org/glsa/201709-27
https://usn.ubuntu.com/3602-1/

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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.