Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Screen | <= 4.8.0 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 32 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/02/09/8ExploitMailing ListThird Party Advisory
- https://ftp.gnu.org/gnu/screen/Product
- https://lists.debian.org/debian-lts-announce/2021/02/msg00031.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.htmlExploitMailing ListVendor Advisory
- https://security.gentoo.org/glsa/202105-11Third Party Advisory
- https://www.debian.org/security/2021/dsa-4861Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/09/3ExploitMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/09/8ExploitMailing ListThird Party Advisory
- https://ftp.gnu.org/gnu/screen/Product
- https://lists.debian.org/debian-lts-announce/2021/02/msg00031.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.htmlExploitMailing ListVendor Advisory
FAQ
What is CVE-2021-26937?
CVE-2021-26937 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2021-26937?
CVE-2021-26937 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-26937?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Screen, Debian Debian Linux, Fedoraproject Fedora.