CVE-2021-39896

In all versions of GitLab CE/EE since version 8.0, when an admin uses the impersonate feature twice and stops impersonating, the admin may be logged in as the second user they impersonated, which may lead to repudiation issues.

CVSS v3.0 3.8 LOW
CVSS v2.0 5.5 MEDIUM

3.8^/10

CVSS v3.0 : LOW

Vector :

Exploitability : 1.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

5.5^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:P/A:N

Exploitability : 8.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39896.json	Vendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/339362	Broken Link

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*

Information

Published : 2021-10-04 10:15

Updated : 2021-10-12 07:14

NVD link : CVE-2021-39896

Mitre link : CVE-2021-39896

JSON object : View

CWE

NVD-CWE-noinfo

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Products Affected

gitlab

gitlab

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39896.json", "name": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39896.json", "tags": ["Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/339362", "name": "https://gitlab.com/gitlab-org/gitlab/-/issues/339362", "tags": ["Broken Link"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "In all versions of GitLab CE/EE since version 8.0, when an admin uses the impersonate feature twice and stops impersonating, the admin may be logged in as the second user they impersonated, which may lead to repudiation issues."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-39896", "ASSIGNER": "cve@gitlab.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 5.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 4.9, "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.8, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 1.2}}, "publishedDate": "2021-10-04T17:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "14.1.7", "versionStartIncluding": "8.0.0"}, {"cpe23Uri": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "14.1.7", "versionStartIncluding": "8.0.0"}, {"cpe23Uri": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "14.2.5", "versionStartIncluding": "14.2"}, {"cpe23Uri": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "14.2.5", "versionStartIncluding": "14.2"}, {"cpe23Uri": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "14.3.1", "versionStartIncluding": "14.3"}, {"cpe23Uri": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "14.3.1", "versionStartIncluding": "14.3"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2021-10-12T14:14Z"}