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CVE-2016-4956

Status Candidate

Overview

ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (interleaved-mode transition and time change) via a spoofed broadcast packet. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-1548.

Related Files

HPE Security Bulletin HPESBHF03757 1
Posted Jun 8, 2017
Authored by Hewlett Packard Enterprise | Site hpe.com

HPE 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
SHA-256 | 8ebfadf170d8633a6909f8a457571f141c45d90c5465ec0a3703ee10cecd1e08
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
SHA-256 | b8f300fae17a52f76a9e98de101486d8e3686770df1e46d25f5d8739810e8276
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
SHA-256 | a7b94c26485947b359ea2bbe1ba46aa71dadbbf15f631d330327cd379a7838fd
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