Scientific Linux Security Update : openssh on SL6.x i386/x86_64

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

Security Fix(es) :

- It was found that the OpenSSH client did not properly
enforce the ForwardX11Timeout setting. A malicious or
compromised remote X application could possibly use this
flaw to establish a trusted connection to the local X
server, even if only untrusted X11 forwarding was
requested. (CVE-2015-5352)

- A flaw was found in the way OpenSSH handled PAM
authentication when using privilege separation. An
attacker with valid credentials on the system and able
to fully compromise a non-privileged pre-authentication
process using a different flaw could use this flaw to
authenticate as other users. (CVE-2015-6563)

- A use-after-free flaw was found in OpenSSH. An attacker
able to fully compromise a non-privileged
pre-authentication process using a different flaw could
possibly cause sshd to crash or execute arbitrary code
with root privileges. (CVE-2015-6564)

- An access flaw was discovered in OpenSSH; the OpenSSH
client did not correctly handle failures to generate
authentication cookies for untrusted X11 forwarding. A
malicious or compromised remote X application could
possibly use this flaw to establish a trusted connection
to the local X server, even if only untrusted X11
forwarding was requested. (CVE-2016-1908)

See also :

http://www.nessus.org/u?0efb7682

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 91540 ()

Bugtraq ID:

CVE ID: CVE-2015-5352
CVE-2015-6563
CVE-2015-6564
CVE-2016-1908

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