Vulnerability identifier: #VU39219

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7597

CWE-ID: CWE-20

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_dirread.c in LibTIFF 4.0.7 has an "outside the range of representable values of type float" undefined behavior issue, which might allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted image.

Mitigation
Install update from vendor's website.

Vulnerable software versions

LibTIFF: 4.0.7

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External links
http://www.debian.org/security/2017/dsa-3844
http://www.securityfocus.com/bid/97504
http://blogs.gentoo.org/ago/2017/04/01/libtiff-multiple-ubsan-crashes
http://security.gentoo.org/glsa/201709-27
http://usn.ubuntu.com/3602-1/

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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.