HPE Security Bulletin HPESBHF03779 1 - A remotely exploitable denial of service vulnerability has been identified in HPE Fabric OS (FOS) running OpenSSH. This impacts versions prior to FOS v7.4.2. Revision 1 of this advisory.
e2d2b9631edb30a7ff9049c57731463bbe76cb777245783bd044fe3d853f4acfRed Hat Security Advisory 2017-2029-01 - OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server. The following packages have been upgraded to a later upstream version: openssh. Security Fix: A covert timing channel flaw was found in the way OpenSSH handled authentication of non-existent users. A remote unauthenticated attacker could possibly use this flaw to determine valid user names by measuring the timing of server responses.
d968f1977aa418a410f4eb0347eb315fb89ecda3c383e34f02b7ceef8867f98aOpenSSH versions 7.2 and below crypt CPU consumption denial of service exploit.
85813c4a45e54ff563c3ade3e42af0997614ba11790f829f24352c73b552928dUbuntu Security Notice 3061-1 - Eddie Harari discovered that OpenSSH incorrectly handled password hashing when authenticating non-existing users. A remote attacker could perform a timing attack and enumerate valid users. Tomas Kuthan, Andres Rojas, and Javier Nieto discovered that OpenSSH did not limit password lengths. A remote attacker could use this issue to cause OpenSSH to consume resources, leading to a denial of service. Various other issues were also addressed.
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