CVE-2020-5209

Published: Jan 28, 2020Modified: Jun 17, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

Description

In NetHack before 3.6.5, unknown options starting with -de and -i can cause a buffer overflow resulting in a crash or remote code execution/privilege escalation. This vulnerability affects systems that have NetHack installed suid/sgid and shared systems that allow users to influence command line options. Users should upgrade to NetHack 3.6.5.

Affected (1)

Products: Nethack: Nethack

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Nethack Nethack	Before 3.6.5

Related CWEs

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

References (4)

https://github.com/NetHack/NetHack/commit/f3def5c0b999478da2d0a8f0b6a7c370a2065f77

Source: security-advisories@github.com

Patch

https://github.com/NetHack/NetHack/security/advisories/GHSA-fw72-r8xm-45p8

Source: security-advisories@github.com

Third Party Advisory

https://github.com/NetHack/NetHack/commit/f3def5c0b999478da2d0a8f0b6a7c370a2065f77

Source: af854a3a-2127-422b-91ae-364da2661108

Patch

https://github.com/NetHack/NetHack/security/advisories/GHSA-fw72-r8xm-45p8

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.