CVE-2021-26937
Published: August 31, 2023Last modified: August 31, 2023
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | screen | Not affected (4.9.0-r1) |
| Stream | screen | Not affected (4.9.1-r0) |
References
- http://www.openwall.com/lists/oss-security/2021/02/09/8
- https://ftp.gnu.org/gnu/screen/
- https://lists.debian.org/debian-lts-announce/2021/02/msg00031.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/
- https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html
- https://security.gentoo.org/glsa/202105-11
- https://www.debian.org/security/2021/dsa-4861
- https://www.openwall.com/lists/oss-security/2021/02/09/3