SB2021010811 - Multiple vulnerabilities in GitLab

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Main Vulnerability Database SB2021010811

SB2021010811 - Multiple vulnerabilities in GitLab

Published: January 8, 2021 Updated: January 24, 2021

Security Bulletin ID SB2021010811
CSH Severity
High
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 20% Medium 40% Low 40%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 vulnerabilities.


1) Improper Authentication (CVE-ID: CVE-2021-22171)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote attacker can steal a user's API acces token through Gitlab pages, bypass the authentication process and gain unauthorized access to the application.


2) Information disclosure (CVE-ID: CVE-2021-22167)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


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

The vulnerability exists due to excessive data output by the application. Incorrect headers within a specific project page allows attacker to have temporary read access to a public repository with project features restricted to only members.


3) Input validation error (CVE-ID: CVE-2021-22168)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied in in NuGet API. A remote user can pass specially crafted input to the application and perform a regular expression denial of service (DoS) attack.


4) Input validation error (CVE-ID: CVE-2021-22166)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


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 when processing HTTP requests with custom method in Prometheus. A remote attacker can pass specially crafted HTTP request to the application and perform a denial of service (DoS) attack.


5) Input validation error (CVE-ID: CVE-2020-26414)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in regex when processing package names during package uploads. A remote user can pass specially crafted input to the application and perform a regular expression denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References