9.8

CVE-2020-9366: gnu screen Out-of-bounds Write

CVSS: 9.8v3.1CriticalModified
AliasesALPINE-CVE-2020-9366DEBIAN-CVE-2020-9366
Published 24-02-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-9366 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in gnu screen. EPSS estimates a 2.71% chance of exploitation in the next 30 days, higher than 85.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
2.71%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-02-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.71%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

0.00 pp

From 2.71% on 20-09-2026

20-09-202620-10-2026
EPSS score
2.71%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • screen< 4.6.2-r1 | < 4.7.0-r1 | < 4.8.0-r0
Debian1 product
  • screen< 4.8.0-1
Gnu1 product

3 vendors · 3 products

References

6 links