CVE-2021-26937 Information

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:H

Reference

https://www.openwall.com/lists/oss-security/2021/02/09/3 https://ftp.gnu.org/gnu/screen/ https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html http://www.openwall.com/lists/oss-security/2021/02/09/8 https://lists.debian.org/debian-lts-announce/2021/02/msg00031.html https://www.debian.org/security/2021/dsa-4861 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/ https://security.gentoo.org/glsa/202105-11

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8