Vulnerability CVE-2021-39935

Vulnerability Name:

CVE-2021-39935 (CCN-215143)

Assigned:

2021-12-12

Published:

2021-12-12

Updated:

2021-12-15

Summary:

An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform Server Side Requests via the CI Lint API

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): None Availibility (A): None

6.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N)
5.9 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Changed
Impact Metrics:	Confidentiality (C): High Integrity (I): None Availibility (A): None

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

5.4 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:C/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): High Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): None Availibility (A): None

Vulnerability Type:

CWE-918

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2021-39935

Source: XF
Type: UNKNOWN
gitlab-cve202139935-ssrf(215143)

Source: CCN
Type: GitLab Web site
CVE-2021-39935

Source: CONFIRM
Type: Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.json

Source: MISC
Type: Broken Link
https://gitlab.com/gitlab-org/gitlab/-/issues/346187

Source: MISC
Type: Permissions Required, Third Party Advisory
https://hackerone.com/reports/1236965

Vulnerable Configuration:

Configuration 1:

cpe:/a:gitlab:gitlab:*:*:*:*:community:*:*:* (Version >= 10.5.0 and < 14.3.6)

OR cpe:/a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* (Version >= 10.5.0 and < 14.3.6)

OR cpe:/a:gitlab:gitlab:*:*:*:*:community:*:*:* (Version >= 14.4.0 and < 14.4.4)

OR cpe:/a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* (Version >= 14.4.0 and < 14.4.4)

OR cpe:/a:gitlab:gitlab:*:*:*:*:community:*:*:* (Version >= 14.5.0 and < 14.5.2)

OR cpe:/a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* (Version >= 14.5.0 and < 14.5.2)

Configuration CCN 1:

cpe:/a:gitlab:gitlab:10.5:*:*:*:community:*:*:*

Denotes that component is vulnerable

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