Security Advisory 0023

Security Advisory 0023 PDF Date: August 15th, 2016 Version: 1.0 Revision| Date| Changes ---|---|--- 1.0 | August 15th, 2016 | Initial release 1.1 | September 15th, 2016 | Updated to include fixed software versions Arista Products vulnerability report for security vulnerability CVE-2016-5696 that...

Linux device TCP connection exposure to high-risk vulnerabilities: as long as the access network might be attack-vulnerability warning-the black bar safety net

Generally, we would think, to confirm on the Internet any two whether the host device to establish a TCP connection Newsletter, in fact, is not easy--the attacker if not both sides of the communication path, it is even more so. In addition, if the attacker is not in the communication path to be...

Serious TCP Bug in Linux Systems Allows Traffic Hijacking

A serious vulnerability in the TCP implementation in Linux systems deployed since 2012 version 3.6 of the Linux kernel can be used by attackers to identify hosts communicating over the protocol and ultimately attack that traffic. Researchers from the University of California, Riverside and the U....

CVE-2016-5696

It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the chang...

UBUNTU-CVE-2016-1547

An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if...

CVE-2016-1547

An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if...

PT-2016-4855 · Ntp +8 · Ntp +8

Name of the Vulnerable Software and Affected Versions: NTP versions 4.2.8p4 and earlier NTPSec version a5fb34b9cc89b92a8fef2f459004865c93bb7f92 Description: An off-path attacker can cause a preemptible client association to be demobilized by sending a crypto NAK packet to a victim client with a...

Network Time Protocol Crypto-NAK Preemptible Association Denial of Service Vulnerability

SUMMARY An off-path attacker can cause a preemptible client association to be demobilized by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled. Furthermore, if the attacker keeps sending cryp...

Network Time Protocol ntpq and ntpdc Origin Timestamp Disclosure Vulnerability

CERT VU357792 Summary To prevent off-path attackers from impersonating legitimate peers, clients require that the origin timestamp in a received response packet match the transmit timestamp from its last request to a given peer. Under assumption that only the recipient of the request packet will...

Network Time Protocol Authenticated Preemptable Modes Denial-of-Service Vulnerability

CERT VU357792 Summary Expected Behavior: The protocol should prevent against off-path Denial of Service attacks in authenticated broadcast and other modes which create preemptable associations, such as: multicast client, manycast client, pool client modes, and associations configured with the...

F5 Networks BIG-IP : NTP vulnerability (K17566)

The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted 'KOD' messages. CVE-2015-7704 Impact An off-path attacker can send a crafted Kiss of Death KoD packet to the client, which will increase the client's...

NAK to the Future: NTP Symmetric Association Authentication Bypass Vulnerability

Talos Vulnerability Report TALOS-2015-0069 NAK to the Future: NTP Symmetric Association Authentication Bypass Vulnerability October 21, 2015 CVE Number CVE-2015-7871 Summary Unauthenticated off-path attackers can force ntpd processes to peer with malicious time sources of the attacker’s choosing...

krb5 security and bug fix update

1.6.1-36.el55.3 - add upstream patch to fix a few use-after-free bugs, including one in kadmind CVE-2010-0629, 578185 1.6.1-36.el55.2 - pull changes to libkrb5 to properly handle and chase off-path referrals back from 1.7 574387...