SB2019091902 - Amazon Linux AMI update for zsh
Published: September 19, 2019
Security Bulletin ID
SB2019091902
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Authorization bypass (CVE-ID: CVE-2018-13259)
The vulnerability allows a local attacker to execute a program without proper authorization on the target system.
The vulnerability exists due to improper truncating of shebang (#!) lines that exceed 64 characters. A local attacker can access the shell and submit a shebang line longer than 64 characters, cause the software to make an execve() call to a program name that is a substring of the intended one and execute a program without proper authorization on the system.
Remediation
Install update from vendor's website.