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

This script is Copyright (C) 2015-2016 Tenable Network Security, Inc.


Synopsis :

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

Description :

* A NULL pointer dereference flaw was found in the way the Linux
kernel's virtual console implementation handled reference counting
when accessing pseudo-terminal device files (/dev/pts/*). A local,
unprivileged attacker could use this flaw to crash the system.
(CVE-2011-5321, Moderate)

* It was found that the Linux kernel's ping socket implementation did
not properly handle socket unhashing during spurious disconnects,
which could lead to a use-after-free flaw. On x86-64 architecture
systems, a local user able to create ping sockets could use this flaw
to crash the system. On non-x86-64 architecture systems, a local user
able to create ping sockets could use this flaw to escalate their
privileges on the system. (CVE-2015-3636, Moderate)

* An integer overflow flaw was found in the way the Linux kernel
randomized the stack for processes on certain 64-bit architecture
systems, such as x86-64, causing the stack entropy to be reduced by
four. (CVE-2015-1593, Low)

* A flaw was found in the way the Linux kernel's 32-bit emulation
implementation handled forking or closing of a task with an 'int80'
entry. A local user could potentially use this flaw to escalate their
privileges on the system. (CVE-2015-2830, Low)

* It was found that the Linux kernel's TCP/IP protocol suite
implementation for IPv6 allowed the Hop Limit value to be set to a
smaller value than the default one. An attacker on a local network
could use this flaw to prevent systems on that network from sending or
receiving network packets. (CVE-2015-2922, Low)

For information on the most significant of these changes, users are
directed to the following article on the Red Hat Customer Portal :

The system must be rebooted for this update to take effect.

See also :

http://www.nessus.org/u?8622f7ff

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 84790 ()

Bugtraq ID:

CVE ID: CVE-2011-5321
CVE-2015-1593
CVE-2015-2830
CVE-2015-2922
CVE-2015-3636

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