CVE-2021-26937

CWE-88CWE-787 — Out-of-bounds Write9 documents8 sources
Severity
9.8CRITICAL
EPSS
11.9%
top 6.25%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
GNU ScreenDebian Debian LinuxFedoraproject Fedora
Timeline
PublishedFeb 9
Latest updateMay 24

Description

encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write access and application crash) or possibly have unspecified other impact via a crafted UTF-8 character sequence.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

▶Debianscreen< 4.8.0-5+3
▶NVDgnu/screen4.8.0

Also affects: Debian Linux 10.0, 9.0, Fedora 32, 33

🔴Vulnerability Details

3
GHSA
GHSA-pjrj-fmxp-cmc4: encoding↗2022-05-24
▶
OSV
CVE-2021-26937: encoding↗2021-02-09
▶
CVEList
CVE-2021-26937: encoding↗2021-02-09
▶

📋Vendor Advisories

5
Ubuntu
GNU Screen vulnerability↗2021-02-24
▶
Ubuntu
GNU Screen vulnerability↗2021-02-24
▶
Red Hat
screen: crash when processing combining chars↗2021-02-10
▶
Microsoft
encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write access and application crash) or possibly have unspecified other impact via a crafted UTF-8 c↗2021-02-09
▶
Debian
CVE-2021-26937: screen - encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial...↗2021
▶
CVE-2021-26937 (CRITICAL CVSS 9.8) | encoding.c in GNU Screen through 4. | cvebase.io