SB2017090814 - Slackware Linux update for bash
Published: September 8, 2017
Security Bulletin ID
SB2017090814
Severity
High
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Improper input validation (CVE-ID: CVE-2016-0634)
The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.
The vulnerability exists in the expansion of 'h' in the prompt string due to insufficient validation of user-supplied input. A remote attacker can place shell metacharacters in 'hostname' of a machine and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) 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.
Remediation
Install update from vendor's website.