SB2018092104 - Amazon Linux AMI update for ntp
Published: September 21, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Stack-based buffer overflow (CVE-ID: CVE-2018-12327)
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists due to stack-based buffer overflow in the Network Time Protocol Query (ntpq) program and Network Time Protocol daemon (ntpd) when handling malicious input. A local attacker can submit a long string argument for an IPv4 or IPv6 command-line parameter, trigger memory corruption and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Security restrictions bypass (CVE-ID: CVE-2018-7170)
The vulnerability allows a remote authenticated attacker to bypass security restrictions on the target system.The weakness exists due to insufficient security restrictions. A remote attacker can create multiple crafted ephemeral associations to bypass security restrictions and modify the clock.
3) Security restrictions bypass (CVE-ID: CVE-2016-1549)
The vulnerability allows a remote attacker to bypass security restrictions on the target system.The weakness exists due to insufficient security restrictions. A remote attacker can create multiple crafted ephemeral associations to bypass security restrictions and modify the clock.
Remediation
Cybersecurity Help is not aware of any official remediation provided by the vendor.