PT-2020-18305 · Nethack · Nethack

Nhkeni · Published 2020-01-28 · Updated 2021-02-10 · CVE-2020-5209

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions NetHack versions prior to 3.6.5

Description The issue is caused by unknown options starting with -de and -i that can lead to a buffer overflow, resulting in a crash or remote code execution/privilege escalation. This affects systems with NetHack installed suid/sgid and shared systems where users can influence command line options.

Recommendations For versions prior to 3.6.5, upgrade to NetHack 3.6.5 to resolve the issue. As a temporary workaround, consider restricting the use of unknown command line options starting with -de and -i to minimize the risk of exploitation.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2020-5209

GHSA-FW72-R8XM-45P8

MGASA-2021-0077

Affected Products

Nethack

References · 26

• https://github.com/NetHack/NetHack/commit/f3def5c0b999478da2d0a8f0b6a7c370a2065f77 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2020-5209 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-5209 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0077 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-5209 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-5209 · Security Note
• https://advisories.mageia.org/MGASA-2021-0077.html · Security Note
• https://osv.dev/vulnerability/CVE-2020-5209 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-5209 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-5209 · Vendor Advisory
• https://github.com/NetHack/NetHack/security/advisories/GHSA-fw72-r8xm-45p8 · Note
• https://nethack.org/v364/release.html · Note
• https://nethack.org/v365/release.html · Note
• https://t.me/cvenotify/537 · Telegram Post
• https://nethack.org/security/CVE-2019-19905.html · Note