SB2021060148 - Multiple vulnerabilities in GitLab Community Edition (CE) and Enterprise Edition (EE)

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Main Vulnerability Database SB2021060148

SB2021060148 - Multiple vulnerabilities in GitLab Community Edition (CE) and Enterprise Edition (EE)

Published: June 1, 2021 Updated: August 20, 2022

Security Bulletin ID SB2021060148
Severity
High
Patch available
YES
Number of vulnerabilities 10
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

High 10% Medium 40% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 10 secuirty vulnerabilities.


1) Cross-site scripting (CVE-ID: CVE-2021-22213)

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 OAuth flow. 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.


2) Input validation error (CVE-ID: CVE-2021-22181)

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. A remote authenticated attacker can create a recursive pipeline relationship to exhaust resources and perform a denial of service (DoS) attack.


3) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2021-22214)

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.


4) Resource exhaustion (CVE-ID: CVE-2021-22217)

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 authenticated attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.


5) Insufficient Session Expiration (CVE-ID: CVE-2021-22221)

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient session expiration issue. A remote non-authenticated attacker can obtain or guess session token and gain unauthorized access to session that belongs to another user.


6) Resource exhaustion (CVE-ID: CVE-2021-22216)

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 authenticated attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.


7) Stored cross-site scripting (CVE-ID: CVE-2021-22220)

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 blob viewer of notebooks. 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.


8) Information disclosure (CVE-ID: CVE-2021-22219)

The vulnerability allows a remote user to gain access to potentially sensitive information.

The vulnerability exists due to the sensitive information is not correctly registered for log masking. A remote administrator can gain unauthorized access to sensitive information on the system.


9) Information disclosure (CVE-ID: CVE-2021-22215)

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 administrator can leak information about the members' on-call rotations in other projects.


10) Improper Certificate Validation (CVE-ID: CVE-2021-22218)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper handling of x509 certificates. A remote authenticated attacker can spoof author of signed commits. 


Remediation

Install update from vendor's website.

References