SB2023051694 - Red Hat Enterprise Linux 8 update for git 

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Main Vulnerability Database SB2023051694

SB2023051694 - Red Hat Enterprise Linux 8 update for git

Published: May 16, 2023 Updated: May 29, 2023

Security Bulletin ID SB2023051694
Severity
High
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 25% Medium 25% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Untrusted search path (CVE-ID: CVE-2022-24765)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to application uses by default the C:\.git folder. A local user with ability to write files into the said directory can place a malicious file into it and execute it with elevated privileges.

Users of the Microsoft fork of Git are vulnerable simply by starting a Git Bash.


2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-29187)

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions. A remote user can bypass implemented security restrictions and privilege escalation on the system when navigating as root into a shared tmp directory owned by the victim, but where an attacker can create a git repository.


3) Input validation error (CVE-ID: CVE-2022-39253)

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to the way Git handles hardlinks when performing a local clone. A remote attacker can trick the victim into clocking a malicious repository and create or copy hardlinks to critical files on the system, which can result in sensitive information exposure.


4) Heap-based buffer overflow (CVE-ID: CVE-2022-39260)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the "git shell" command when handling untrusted input. A remote attacker can trick the victim to execute the affected command against a malicious repository, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install update from vendor's website.

References