Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20150714)

medium Nessus Plugin ID 84790


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


* 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.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 84790

File Name: sl_20150714_kernel_on_SL6_x.nasl

Version: 2.5

Type: local

Agent: unix

Published: 7/16/2015

Updated: 1/14/2021

Supported Sensors: Nessus Agent

Risk Information


Risk Factor: Medium

Score: 6.1


Risk Factor: Medium

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N


Risk Factor: Medium

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: p-cpe:/a:fermilab:scientific_linux:dracut, p-cpe:/a:fermilab:scientific_linux:dracut-caps, p-cpe:/a:fermilab:scientific_linux:dracut-fips, p-cpe:/a:fermilab:scientific_linux:dracut-fips-aesni, p-cpe:/a:fermilab:scientific_linux:dracut-generic, p-cpe:/a:fermilab:scientific_linux:dracut-kernel, p-cpe:/a:fermilab:scientific_linux:dracut-network, p-cpe:/a:fermilab:scientific_linux:dracut-tools, p-cpe:/a:fermilab:scientific_linux:kernel, p-cpe:/a:fermilab:scientific_linux:kernel-abi-whitelists, p-cpe:/a:fermilab:scientific_linux:kernel-debug, p-cpe:/a:fermilab:scientific_linux:kernel-debug-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-debug-devel, p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common-i686, p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common-x86_64, p-cpe:/a:fermilab:scientific_linux:kernel-devel, p-cpe:/a:fermilab:scientific_linux:kernel-doc, p-cpe:/a:fermilab:scientific_linux:kernel-firmware, p-cpe:/a:fermilab:scientific_linux:kernel-headers, p-cpe:/a:fermilab:scientific_linux:perf, p-cpe:/a:fermilab:scientific_linux:perf-debuginfo, p-cpe:/a:fermilab:scientific_linux:python-perf, p-cpe:/a:fermilab:scientific_linux:python-perf-debuginfo, x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 7/14/2015

Vulnerability Publication Date: 3/16/2015

Reference Information

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