Data handling in ntp - CVE-2016-7429

Vulnerability identifier: #VU12302

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2016-7429

CWE-ID: CWE-19

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to changing the peer structure to the interface NTP receives the response from a source. A remote attacker can send a response for a source to an interface the source does not use and cause the service to crash.

ntp
Amazon Linux AMI
Arch Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux EUS Compute Node
Fedora
ntp

Update to version 4.2.8p9.

ntp - addressed in versions 4.2.6p5-43.fc23, 4.2.6p5-43.fc24, 4.2.6p5-43.fc25

• https://www.nwtime.org/ntp428p9_release/

• Amazon Linux AMI update for ntp
• Red Hat update for ntp
• Arch Linux update for ntp
• Fedora 24 update for ntp
• Fedora 25 update for ntp
• Fedora 23 update for ntp