#VU40040 Buffer overflow in LibTIFF - CVE-2016-9535

Vulnerability identifier: #VU40040

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-9535

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

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

Vendor: LibTIFF

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

tif_predict.h and tif_predict.c in libtiff 4.0.6 have assertions that can lead to assertion failures in debug mode, or buffer overflows in release mode, when dealing with unusual tile size like YCbCr with subsampling. Reported as MSVR 35105, aka "Predictor heap-buffer-overflow."

Mitigation
Install update from vendor's website.

Vulnerable software versions

LibTIFF: 4.0.6

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External links
https://rhn.redhat.com/errata/RHSA-2017-0225.html
https://www.debian.org/security/2017/dsa-3844
https://www.securityfocus.com/bid/94484
https://www.securityfocus.com/bid/94744
https://github.com/vadz/libtiff/commit/3ca657a8793dd011bf869695d72ad31c779c3cc1
https://github.com/vadz/libtiff/commit/6a984bf7905c6621281588431f384e79d11a2e33

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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.