SB2022102701 - Cloud Foundry Foundation cflinuxfs3 update for Git

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2020-16156)

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

The vulnerability exists due to incorrect processing of signed code. A remote attacker trick the victim into downloading a malicious file, bypass signature verification procedure and compromise the affected system.

2) 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.

3) 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

• https://github.com/cloudfoundry/cflinuxfs3/releases/tag/0.329.0