Vulnerability Name:

CVE-2021-39871 (CCN-210614)

Assigned:2021-10-01
Published:2021-10-01
Updated:2021-10-12
Summary:In all versions of GitLab CE/EE since version 13.0, an instance that has the setting to disable Bitbucket Server import enabled is bypassed by an attacker making a crafted API call.
CVSS v3 Severity:4.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
3.8 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
4.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
3.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
4.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-39871

Source: XF
Type: UNKNOWN
gitlab-cve202139871-sec-bypass(210614)

Source: CCN
Type: GitLab Web site
CVE-2021-39871

Source: CONFIRM
Type: Vendor Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39871.json

Source: MISC
Type: Broken Link
https://gitlab.com/gitlab-org/gitlab/-/issues/340782

Source: MISC
Type: Permissions Required, Third Party Advisory
https://hackerone.com/reports/630263

Vulnerable Configuration:Configuration 1:
  • cpe:/a:gitlab:gitlab:4.3.0:*:*:*:community:*:*:*
  • OR cpe:/a:gitlab:gitlab:4.3.0:*:*:*:enterprise:*:*:*
  • OR cpe:/a:gitlab:gitlab:*:*:*:*:community:*:*:* (Version >= 13.0.0 and < 14.1.7)
  • OR cpe:/a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* (Version >= 13.0.0 and < 14.1.7)
  • OR cpe:/a:gitlab:gitlab:*:*:*:*:community:*:*:* (Version >= 14.2.0 and < 14.2.5)
  • OR cpe:/a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* (Version >= 14.2.0 and < 14.2.5)

    • Configuration CCN 1:
  • cpe:/a:gitlab:gitlab:13.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    gitlab gitlab 4.3.0
    gitlab gitlab 4.3.0
    gitlab gitlab *
    gitlab gitlab *
    gitlab gitlab *
    gitlab gitlab *
    gitlab gitlab 13.0