SB2019110646 - Red Hat update for patch
Published: November 6, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) OS Command Injection (CVE-ID: CVE-2018-20969)
CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to the "do_ed_script" function in the "pch.c" file does not block strings beginning with a ! character. A remote unauthenticated attacker can trick a victim to open a specially crafted patch file and execute arbitrary OS shell commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) OS Command Injection (CVE-ID: CVE-2019-13638)
CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to insufficient validation of ed style diff payload with shell metacharacters in patch files. A remote attacker can trick the victim to use a specially crafted patch file and execute arbitrary OS commands.
Remediation
Install update from vendor's website.