CVE-2021-26937

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/9/2021

Last Modified5/9/2025

Sourcenvd

Honeypot Sightings0

Affected Products

debian:debian_linuxfedoraproject:fedoragnu:screen

Weaknesses (CWE)

CWE-88

References

http://www.openwall.com/lists/oss-security/2021/02/09/8(cve@mitre.org)

https://ftp.gnu.org/gnu/screen/(cve@mitre.org)

https://lists.debian.org/debian-lts-announce/2021/02/msg00031.html(cve@mitre.org)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/(cve@mitre.org)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/(cve@mitre.org)

https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html(cve@mitre.org)

https://security.gentoo.org/glsa/202105-11(cve@mitre.org)

https://www.debian.org/security/2021/dsa-4861(cve@mitre.org)

https://www.openwall.com/lists/oss-security/2021/02/09/3(cve@mitre.org)

http://www.openwall.com/lists/oss-security/2021/02/09/8(af854a3a-2127-422b-91ae-364da2661108)

https://ftp.gnu.org/gnu/screen/(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2021/02/msg00031.html(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/(af854a3a-2127-422b-91ae-364da2661108)

https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html(af854a3a-2127-422b-91ae-364da2661108)

https://security.gentoo.org/glsa/202105-11(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20250509-0004/(af854a3a-2127-422b-91ae-364da2661108)

https://www.debian.org/security/2021/dsa-4861(af854a3a-2127-422b-91ae-364da2661108)

https://www.openwall.com/lists/oss-security/2021/02/09/3(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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