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CVE-2015-3405

Status Candidate

Overview

ntp-keygen in ntp 4.2.8px before 4.2.8p2-RC2 and 4.3.x before 4.3.12 does not generate MD5 keys with sufficient entropy on big endian machines when the lowest order byte of the temp variable is between 0x20 and 0x7f and not #, which might allow remote attackers to obtain the value of generated MD5 keys via a brute force attack with the 93 possible keys.

Related Files

Red Hat Security Advisory 2015-2231-04
Posted Nov 20, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-2231-04 - The Network Time Protocol is used to synchronize a computer's time with another referenced time source. These packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service. It was found that because NTP's access control was based on a source IP address, an attacker could bypass source IP restrictions and send malicious control and configuration packets by spoofing ::1 addresses. A denial of service flaw was found in the way NTP hosts that were peering with each other authenticated themselves before updating their internal state variables. An attacker could send packets to one peer host, which could cascade to other peers, and stop the synchronization process among the reached peers.

tags | advisory, denial of service, spoof, protocol
systems | linux, redhat
advisories | CVE-2014-9297, CVE-2014-9298, CVE-2014-9750, CVE-2014-9751, CVE-2015-1798, CVE-2015-1799, CVE-2015-3405
MD5 | 738d8a326cd620fcecec2cb10f69355b
Debian Security Advisory 3388-1
Posted Nov 2, 2015
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3388-1 - Several vulnerabilities were discovered in the Network Time Protocol daemon and utility programs.

tags | advisory, vulnerability, protocol
systems | linux, debian
advisories | CVE-2014-9750, CVE-2014-9751, CVE-2015-3405, CVE-2015-5146, CVE-2015-5194, CVE-2015-5195, CVE-2015-5219, CVE-2015-5300, CVE-2015-7691, CVE-2015-7692, CVE-2015-7701, CVE-2015-7702, CVE-2015-7703, CVE-2015-7704, CVE-2015-7850, CVE-2015-7852, CVE-2015-7855, CVE-2015-7871
MD5 | d8bbdd9253d9a0b5ea833e6dfa0c4a14
Red Hat Security Advisory 2015-1459-01
Posted Jul 22, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-1459-01 - The Network Time Protocol is used to synchronize a computer's time with another referenced time source. It was found that because NTP's access control was based on a source IP address, an attacker could bypass source IP restrictions and send malicious control and configuration packets by spoofing ::1 addresses. A denial of service flaw was found in the way NTP hosts that were peering with each other authenticated themselves before updating their internal state variables. An attacker could send packets to one peer host, which could cascade to other peers, and stop the synchronization process among the reached peers.

tags | advisory, denial of service, spoof, protocol
systems | linux, redhat
advisories | CVE-2014-9297, CVE-2014-9298, CVE-2015-1798, CVE-2015-1799, CVE-2015-3405
MD5 | fae2ba19f95684d8408b3bc551cf47ea
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