Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS : openssh vulnerabilities (USN-3061-1)

Ubuntu Security Notice (C) 2016 Canonical, Inc. / NASL script (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing a security-related patch.

Description :

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.
(CVE-2016-6210)

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.
(CVE-2016-6515).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected openssh-server package.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 6.4
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 92985 ()

Bugtraq ID:

CVE ID: CVE-2016-6210
CVE-2016-6515

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