#VU6875 Integer underflow - CVE-2017-8911

Vulnerability identifier: #VU6875

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-8911

CWE-ID: CWE-191

Exploitation vector: Network

Exploit availability: No

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer underflow in the unicode_to_utf8() function in tnef 1.4.14. A remote attacker can execute arbitrary code on the target system.

External links
https://www.debian.org/security/2017/dsa-3869

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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.