SB2020093047 - Red Hat Enterprise Linux 7 update for cups
Published: September 30, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Command injection (CVE-ID: CVE-2017-18190)
The vulnerability allows a remote attacker to execute arbitrary commands on the target system.The weakness exists in a localhost.localdomain whitelist entry in valid_host() in scheduler/client.c due to the localhost.localdomain name is often resolved via a DNS server. A remote attacker can send specially crafted POST requests to the CUPS daemon in conjunction with DNS rebinding, inject and execute arbitrary IPP commands.
2) Stack-based buffer overflow (CVE-ID: CVE-2019-8675)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing SNMP requests within the asn1_get_type() function in cups/snmp.c. A remote attacker can send a specially crafted SNMP request to the CUPS service, trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Stack-based buffer overflow (CVE-ID: CVE-2019-8696)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing SNMP requests within the asn1_get_packed() function in cups/snmp.c. A remote attacker with access to the the SNMP service can send a specially crafted request to the application, trigger a stack-based buffer oveflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.