CVE-2021-44513 - Vulnerability Details - OpenCVE

Description

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

Published: 2021-12-07

Score: 7.0 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:tmate:tmate-ssh-server:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-31346	Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Local

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00212.

Key SSVC decision points have not yet been added.

References

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

History

No history.

Subscriptions

Tmate Tmate-ssh-server

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-12-07T02:09:15.000Z

Updated: 2024-08-04T04:25:16.565Z

Reserved: 2021-12-01T00:00:00.000Z

Link: CVE-2021-44513

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-12-07T03:15:07.207

Modified: 2026-06-17T04:12:29.693

Link: CVE-2021-44513

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-12-07T02:09:15.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596"}, {"tags": ["x_refsource_MISC"], "url": "https://www.openwall.com/lists/oss-security/2021/12/06/2"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-44513", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596", "refsource": "MISC", "url": "https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596"}, {"name": "https://www.openwall.com/lists/oss-security/2021/12/06/2", "refsource": "MISC", "url": "https://www.openwall.com/lists/oss-security/2021/12/06/2"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T04:25:16.565Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.openwall.com/lists/oss-security/2021/12/06/2"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-44513", "datePublished": "2021-12-07T02:09:15.000Z", "dateReserved": "2021-12-01T00:00:00.000Z", "dateUpdated": "2024-08-04T04:25:16.565Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:tmate:tmate-ssh-server:*:*:*:*:*:*:*:*", "matchCriteriaId": "49F9B6EA-4B80-44C8-8DDB-C203FB7A854C", "versionEndIncluding": "2.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling."}, {"lang": "es", "value": "Una creaci\u00f3n no segura de directorios temporales en tmate-ssh-server versi\u00f3n 2.3.0, permite a un atacante local comprometer la integridad del manejo de sesiones"}], "id": "CVE-2021-44513", "lastModified": "2026-06-17T04:12:29.693", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.4, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.4, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-12-07T03:15:07.207", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2021/12/06/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2021/12/06/2"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}