SB2022042205 - Cloud Foundry Foundation cflinuxfs3 update for Bash

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Main Vulnerability Database SB2022042205

SB2022042205 - Cloud Foundry Foundation cflinuxfs3 update for Bash

Published: April 22, 2022

Security Bulletin ID SB2022042205
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Check for Dropped Privileges (CVE-ID: CVE-2019-18276)

CWE-ID: CWE-273 - Improper Check for Dropped Privileges

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


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

The vulnerability exists in "disable_priv_mode()" function in shell.c due to the affected software attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded. A local user with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges.


Remediation

Install update from vendor's website.

References