SB2021110402 - Multiple vulnerabilities in GitLab Community Edition (CE) and Enterprise Edition (EE)
Published: November 4, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 16 secuirty vulnerabilities.
1) Stored cross-site scripting (CVE-ID: CVE-2021-39906)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data within the ipynb files. A remote authenticated attacker can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
2) Input validation error (CVE-ID: CVE-2021-39908)
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to insufficient validation of user-supplied input. A remote authenticated attacker can abuse certain Unicode characters to commit malicious code into projects without being noticed in merge request or source code viewer UI.
3) Input validation error (CVE-ID: CVE-2021-39895)
The vulnerability allows a remote user to compromise the target system.
The vulnerability exists due to pipeline schedules on imported projects can be set to automatically active after import. A remote administrator can set the pipeline schedules to be active in a project export so when an unsuspecting owner imports that project, pipelines are active by default on that project.
4) Input validation error (CVE-ID: CVE-2021-39907)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within the Workhorse. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
5) Improper access control (CVE-ID: CVE-2021-39904)
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in the GraphQL API. A remote authenticated attacker can resolve discussions and apply suggestions after a project owner has locked the Merge Request.
6) Information disclosure (CVE-ID: CVE-2021-39905)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output by the application. A remote authenticated attacker can see basic information on private groups that a public project has been shared with.
7) Improper Authorization (CVE-ID: CVE-2021-39902)
The vulnerability allows a remote attacker to bypass authorization checks.
The vulnerability exists due to incorrect authorization. A remote authenticated attacker can modify the severity of an incident.
8) Information disclosure (CVE-ID: CVE-2021-39913)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to accidental logging of system root password in the migration log. A local administrator can gain unauthorized access to sensitive information on the system.
9) Resource exhaustion (CVE-ID: CVE-2021-39912)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can use a specially crafted TIFF images, trigger resource exhaustion and perform a denial of service (DoS) attack.
10) Security features bypass (CVE-ID: CVE-2021-39909)
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to lack of email address ownership verification in the CODEOWNERS feature. A remote authenticated attacker can bypass CODEOWNERS Merge Request approval requirement under rare circumstances.
11) Improper access control (CVE-ID: CVE-2021-39903)
The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A remote authenticated attacker can change the visibility level of a group or a project to a restricted option even after the instance administrator sets that visibility option as restricted in settings.
12) Information disclosure (CVE-ID: CVE-2021-39898)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a project export leaks the external webhook token value. A remote attacker can access to the project which it was exported from.
13) Improper access control (CVE-ID: CVE-2021-39897)
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A remote authenticated attacker can still have access even after the subgroup is transferred.
14) Information disclosure (CVE-ID: CVE-2021-39901)
The vulnerability allows a remote user to gain access to potentially sensitive information.
The vulnerability exists due to SCIM token is visible after creation. A remote administrator can see the SCIM token of a group by visiting a specific endpoint.
15) Input validation error (CVE-ID: CVE-2021-39914)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to regular expression denial of service issue when cleaning namespace path. A remote authenticated attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
16) Improper access control (CVE-ID: CVE-2021-39911)
The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. An authenticated attacker with physical access can gain access to private email address of Issue.
Remediation
Install update from vendor's website.