SB2016070511 - Denial of service in NTP
Published: July 5, 2016 Updated: June 10, 2021
Security Bulletin ID
SB2016070511
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2016-4955)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a race condition in ntpd. A remote attacker can exploit the race and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.
References
- http://www.kb.cert.org/vuls/id/321640
- http://support.ntp.org/bin/view/Main/NtpBug3043
- http://bugs.ntp.org/3043
- http://support.ntp.org/bin/view/Main/SecurityNotice
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.securityfocus.com/bid/91007
- https://security.gentoo.org/glsa/201607-15
- http://www.securitytracker.com/id/1036037
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
- https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf