#VU40036 Buffer overflow in LibTIFF - CVE-2016-9540

Vulnerability identifier: #VU40036

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-2016-9540

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.

tools/tiffcp.c in libtiff 4.0.6 has an out-of-bounds write on tiled images with odd tile width versus image width. Reported as MSVR 35103, aka "cpStripToTile 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-3762
https://www.securityfocus.com/bid/94484
https://www.securityfocus.com/bid/94747
https://github.com/vadz/libtiff/commit/5ad9d8016fbb60109302d558f7edb2cb2a3bb8e3

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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.