CVE-2021-44512 json
World-writable permissions on the /tmp/tmate/sessions directory in tmate-ssh-server 2.3.0 allow a local attacker to compromise the integrit…
published 2021-12-07 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-31345
- cvss
- 7.0
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
World-writable permissions on the /tmp/tmate/sessions directory in tmate-ssh-server 2.3.0 allow a local attacker to compromise the integrity of session handling, or obtain the read-write session ID from a read-only session symlink in this directory.
Patch / fix
- tmate-ssh-server Debian 14, Debian 13 2.3.0-68-gd7334ee4-1
debian advisories DEBIAN-CVE-2021-44512
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.4 | AV:L/AC:M/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-732 Incorrect Permission Assignment for Critical Resource
References
-
github.com
/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596
patch, third-party-advisory
-
openwall.com
/lists/oss-security/2021/12/06/2
mailing-list, third-party-advisory
Sources
- CVE List CVE-2021-44512
- NVD CVE-2021-44512
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