Input validation error in ntp - CVE-2018-8956

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Main Vulnerability Database Vulnerabilities #VU29542

Input validation error in ntp - CVE-2018-8956

Published: July 7, 2020


Vulnerability identifier: #VU29542
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-8956
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing NTP packets. A remote attacker that controls a slave server or is part of the same broadcast can prevent a broadcast client from synchronizing its clock with a broadcast NTP server via spoofed mode 3 and mode 5 packets.



Affected software

ntp
Opensuse
Flex System Chassis Management Module (CMM)

How to mitigate CVE-2018-8956

Install updates from vendor's website.

ntp - update to 4.2.8p14
Flex System Chassis Management Module (CMM) - update to 2pet22a-2.5.20a

External References

Related Security Bulletins