Out-of-bounds Read in Nethack

CVE-2020-5254

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.

Vulnerability class: Buffer Overflow

EPSS: 0.011 (63.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Nethack — versions < 3.6.6

Weakness classification (CWE)

Public proof-of-concept exploits

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2020-5254?: CVE-2020-5254 is a low-severity vulnerability in Nethack, classified under Out-of-bounds Read. CVSS score: 3.9/10. Published 2020-03-10.
How severe is CVE-2020-5254?: Low severity. CVSS v3 base score is 3.9 out of 10.
Is CVE-2020-5254 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.