CVEvulnerability
CVE-2021-26937
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2021-02-09
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-88
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.
Affected configurations
• gnu screen (<= 4.8.0)
• debian debian linux 9.0
• debian debian linux 10.0
• fedoraproject fedora 32
• fedoraproject fedora 33
Related
Weakness · CWE (1)
- CWE-88 Improper Neutralization of Argument Delimiters in a Command weakness
References
- http://www.openwall.com/lists/oss-security/2021/02/09/8 Exploit, Mailing List, Third Party Advisory
- https://ftp.gnu.org/gnu/screen/ Product
- https://lists.debian.org/debian-lts-announce/2021/02/msg00031.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/ lists.fedoraproject.org
- https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html Exploit, Mailing List, Vendor Advisory
- https://security.gentoo.org/glsa/202105-11 Third Party Advisory
- https://www.debian.org/security/2021/dsa-4861 Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/09/3 Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/09/8 Exploit, Mailing List, Third Party Advisory
- https://ftp.gnu.org/gnu/screen/ Product
- https://lists.debian.org/debian-lts-announce/2021/02/msg00031.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/ lists.fedoraproject.org
- https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html Exploit, Mailing List, Vendor Advisory
- https://security.gentoo.org/glsa/202105-11 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20250509-0004/ security.netapp.com
- https://www.debian.org/security/2021/dsa-4861 Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/09/3 Exploit, Mailing List, Third Party Advisory