SB2019101423 - Permissions, Privileges, and Access Controls in sudo (Alpine package) 

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2019101423

SB2019101423 - Permissions, Privileges, and Access Controls in sudo (Alpine package)

Published: October 14, 2019 Updated: February 27, 2024

Security Bulletin ID SB2019101423
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 security vulnerability.


1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-14287)

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

The vulnerability exists in the implementation of the "sudo" application when processing commands that are configured to run with ALL keyword. A local user with privileges to use sudo for specific applications on the system can escalate privileges and run the application as root (even if precisely restricted), if user id "-1" or "4294967295" is used.

Example:

The following entry instructs sudo to allow user bob to run "/usr/bin/id" command as any user on the system but root:

myhost bob = (ALL, !root) /usr/bin/id

The following command will allow bob execute the  "/usr/bin/id" command as root:

sudo -u#-1 id -u

Remediation

Install update from vendor's website.

References