SB2020040702 - Red Hat Enterprise Linux 7 update for ksh
Published: April 7, 2020
Security Bulletin ID
SB2020040702
CSH 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 vulnerability.
1) OS Command Injection (CVE-ID: CVE-2019-14868)
CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
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:U/U:Clear
The vulnerability allows a local user to execute arbitrary shell commands on the target system.
The vulnerability exists in the way ksh evaluates certain environment variables . A local user can set a specially crafted environment variable and execute arbitrary OS commands on the target system.
Remediation
Install update from vendor's website.