What’s Vulnerable › Vulnerabilities

CVE-2021-44512

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-07 · updated 2026-06-17
• Weakness: CWE-732

Description

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.

Affected products

• Tmate-Ssh-Server: through 2.3.0

References

• https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596
• https://www.openwall.com/lists/oss-security/2021/12/06/2
• https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596
• https://www.openwall.com/lists/oss-security/2021/12/06/2

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