SB2021070614 - Multiple vulnerabilities in GitLab
Published: July 6, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 9 secuirty vulnerabilities.
1) Cross-site request forgery (CVE-ID: CVE-2021-22224)
The vulnerability allows a remote attacker to perform cross-site request forgery attacks.
The vulnerability exists due to insufficient validation of the HTTP request origin in the GraphQL API. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website, such as call mutations as the victim.
2) Resource exhaustion (CVE-ID: N/A)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources when using Webhooks. A remote user can trigger resource exhaustion and perform a denial of service (DoS) attack.
3) Information disclosure (CVE-ID: CVE-2021-22231)
The vulnerability allows a remote user to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output by the application. A remote user can read private project details.
4) Improper Authorization (CVE-ID: N/A)
The vulnerability allows a remote user to bypass implemented security restrictions.
The vulnerability exists within the Single Sign-On feature. The application allows new users to be created via single sign on despite user cap being enabled.
5) Improper access control (CVE-ID: CVE-2021-22226)
The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. Under certain conditions, some users were able to push to protected branches that were restricted to deploy keys.
6) Improper access control (CVE-ID: N/A)
The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A remote user can bypass implemented security restrictions and gain unauthorized access to project details using Graphql.
7) Reflected cross-site scripting (CVE-ID: CVE-2021-22228)
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 in release edit page. A remote attacker can trick the victim to follow a specially crafted link 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.
8) DOM-based cross-site scripting (CVE-ID: N/A)
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 when processing clipboard contents. A remote attacker can trick the victim to copy specially crafted contents 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.
9) Stored cross-site scripting (CVE-ID: CVE-2021-22223)
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 in the Audit Log feature when processing the Feature Flag name in PUT requests. A remote 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.
Remediation
Install update from vendor's website.