SB2017010103 - Gentoo update for Bash
Published: January 1, 2017 Updated: January 1, 2017
Security Bulletin ID
SB2017010103
Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Command injection (CVE-ID: CVE-2016-7543)
The vulnerability allows a local attacker to execute arbitrary commands on the target system.
The weakness exists due to insufficient validation of user-supplied input. A local attacker can supply specially crafted SHELLOPTS and PS4 environment variables, inject and execute arbitrary commands with root privileges.
2) Use-after-free (CVE-ID: CVE-2016-9401)
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
popd in bash might allow local users to bypass the restricted shell and cause a use-after-free via a crafted address.
Remediation
Install update from vendor's website.