CVE-2020-5254: nethack Out-of-bounds Read
CVSS: 8.1v3.1HighModified
AliasesUBUNTU-CVE-2020-5254DEBIAN-CVE-2020-5254
Published 10-03-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-5254 is a high (CVSS 8.1) Out-of-bounds Read vulnerability in nethack. EPSS estimates a 1.13% chance of exploitation in the next 30 days, higher than 65.9% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.1 (NVD)EPSS score
1.13%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 10-03-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 8.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HSources4 sources · 3.9–8.1
- CVE.orgCNA3.9LowCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.13%
Chance of exploitation in the next 30 days
Percentile
66%
Versus all other CVEs
30-day change
0.00 pp
From 1.13% on 18-09-2026
18-09-202618-10-2026
EPSS score1.13%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
Affected systems
Debian1 product
- nethack< 3.6.6-1
Nethack1 product
- nethack< 3.6.6 | ≥ 3.6.1, < 3.6.6
Ubuntu1 product
- nethackAll versions (No fix recorded)
3 vendors · 3 products
References
5 links- github.com/NetHack/NetHack/security/advisories/GHSA-2ch6-6r8h-m2p9X Refsource CONFIRMREPORTVendor Advisory
