CVE-2021-44512

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-44512
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44512.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-44512
Downstream
Published
2021-12-07T03:15:07.160Z
Modified
2025-11-20T11:56:26.274977Z
Severity
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/tmate-io/tmate-ssh-server

Affected ranges

Type
GIT
Repo
https://github.com/tmate-io/tmate-ssh-server
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1c020d1f5ca462f5b150b46a027aaa1bbe3c9596

Affected versions

1.*

1.7
1.8
1.9
1.9a

2.*

2.0
2.1
2.3.0

Other

base
to_copy

Database specific

vanir_signatures

[
    {
        "signature_type": "Function",
        "target": {
            "file": "tmate-main.c",
            "function": "main"
        },
        "deprecated": false,
        "source": "https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596",
        "id": "CVE-2021-44512-b4fa32fc",
        "signature_version": "v1",
        "digest": {
            "function_hash": "316549956568796934807268776517522169863",
            "length": 1691.0
        }
    },
    {
        "signature_type": "Line",
        "target": {
            "file": "tmate-main.c"
        },
        "deprecated": false,
        "source": "https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596",
        "id": "CVE-2021-44512-b5bc6fcf",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "80207026068406672254999970398237947067",
                "173423011980781517915885963108284035295",
                "306643597840451258993558618338827943855",
                "83505621522273002792930872341900023227",
                "136076212102058759837031658291138517335",
                "310518699917455409064642457929409388070",
                "176290184624510983014086540170709540683",
                "152451022566174787559069177947798513311",
                "72876143243196640920421934159468931924",
                "184047213435252695687185796533395052901",
                "21004837053619300072504869666184033231",
                "211129072721360576409360749973093728649",
                "229693977904854031536266170358141525484",
                "152841598158707753820788575096253228192"
            ]
        }
    }
]