#VU40042 Buffer overflow in LibTIFF - CVE-2016-9533

Vulnerability identifier: #VU40042

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-2016-9533

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_pixarlog.c in libtiff 4.0.6 has out-of-bounds write vulnerabilities in heap allocated buffers. Reported as MSVR 35094, aka "PixarLog horizontalDifference 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/94742
https://github.com/vadz/libtiff/commit/83a4b92815ea04969d494416eaae3d4c6b338e4a#diff-bdc795f6afeb9558c1012b3cfae729ef

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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.