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CVE-2016-4954

Status Candidate

Overview

The process_packet function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (peer-variable modification) by sending spoofed packets from many source IP addresses in a certain scenario, as demonstrated by triggering an incorrect leap indication.

Related Files

HP Security Bulletin HPESBHF03757 1
Posted Jun 8, 2017
Authored by HP | Site hp.com

HP Security Bulletin HPESBHF03757 1 - Potential security vulnerabilities with NTP have been addressed for HPE network products including Comware 5 and Comware 7. The vulnerabilities could be remotely exploited resulting in Denial of Service (DoS). Revision 1 of this advisory.

tags | advisory, denial of service, vulnerability
advisories | CVE-2016-4953, CVE-2016-4954, CVE-2016-4956, CVE-2016-4957
MD5 | 7d792df9a8d171157fab09102b52aca3
Ubuntu Security Notice USN-3096-1
Posted Oct 5, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3096-1 - Aanchal Malhotra discovered that NTP incorrectly handled authenticated broadcast mode. A remote attacker could use this issue to perform a replay attack. Matt Street discovered that NTP incorrectly verified peer associations of symmetric keys. A remote attacker could use this issue to perform an impersonation attack. Jonathan Gardner discovered that the NTP ntpq utility incorrectly handled memory. An attacker could possibly use this issue to cause ntpq to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2015-7973, CVE-2015-7974, CVE-2015-7975, CVE-2015-7976, CVE-2015-7977, CVE-2015-7978, CVE-2015-7979, CVE-2015-8138, CVE-2015-8158, CVE-2016-0727, CVE-2016-1547, CVE-2016-1548, CVE-2016-1550, CVE-2016-2516, CVE-2016-2518, CVE-2016-4954, CVE-2016-4955, CVE-2016-4956
MD5 | 9b3aea2f08c5b95113b7d617304a06df
FreeBSD Security Advisory - FreeBSD-SA-16:24.ntp
Posted Jun 6, 2016
Site security.freebsd.org

FreeBSD Security Advisory - Multiple vulnerabilities have been discovered in the NTP suite.

tags | advisory, vulnerability
systems | freebsd, bsd
advisories | CVE-2016-4953, CVE-2016-4954, CVE-2016-4955, CVE-2016-4957
MD5 | fce94472a944196f57b09c666a948569
Slackware Security Advisory - ntp Updates
Posted Jun 6, 2016
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New ntp packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, and -current to fix security issues.

tags | advisory
systems | linux, slackware
advisories | CVE-2016-4953, CVE-2016-4954, CVE-2016-4955, CVE-2016-4956, CVE-2016-4957
MD5 | 069ab8fe8f013f64e129f9ed5888ff97
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