#VU7407 Denial of service in LibTIFF - CVE-2017-10688

Vulnerability identifier: #VU7407

Vulnerability risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2017-10688

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: LibTIFF

Description
The vulnerability allows a remote attacker to cause DoS condition.

The weakness exits due to assertion abort in the TIFFWriteDirectoryTagCheckedLong8Array function in tif_dirwrite.c. A remote attacker can send specially crafted TIFF file and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Update to version 4.0.8-3.

Vulnerable software versions

LibTIFF: 4.0.8

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External links
https://github.com/vadz/libtiff/commit/6173a57d39e04d68b139f8c1aa499a24dbe74ba1

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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. However, proof of concept for this vulnerability is available.