Vulnerability identifier: #VU30335

Vulnerability risk: High

CVSSv3.1: 7.3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-5254

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
NetHack
Client/Desktop applications / Games

Vendor: The NetHack DevTeam

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

In NetHack before 3.6.6, some out-of-bound values for the hilite_status option can be exploited. NetHack 3.6.6 resolves this issue.

Mitigation
Install update from vendor's website.

Vulnerable software versions

NetHack: 3.6.1 - 3.6.5

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External links
http://github.com/NetHack/NetHack/security/advisories/GHSA-2ch6-6r8h-m2p9

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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.