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Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20131022)
medium Nessus Plugin ID 70577
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Synopsis
The remote Scientific Linux host is missing one or more security updates.Description
- A flaw was found in the way the Linux kernel handled the creation of temporary IPv6 addresses. If the IPv6 privacy extension was enabled (/proc/sys/net/ipv6/conf/eth0/use_tempaddr is set to '2'), an attacker on the local network could disable IPv6 temporary address generation, leading to a potential information disclosure. (CVE-2013-0343, Moderate)- An information leak flaw was found in the way Linux kernel's device mapper subsystem, under certain conditions, interpreted data written to snapshot block devices. An attacker could use this flaw to read data from disk blocks in free space, which are normally inaccessible. (CVE-2013-4299, Moderate)
- An off-by-one flaw was found in the way the ANSI CPRNG implementation in the Linux kernel processed non-block size aligned requests. This could lead to random numbers being generated with less bits of entropy than expected when ANSI CPRNG was used. (CVE-2013-4345, Moderate)
- An information leak flaw was found in the way Xen hypervisor emulated the OUTS instruction for 64-bit paravirtualized guests. A privileged guest user could use this flaw to leak hypervisor stack memory to the guest. (CVE-2013-4368, Moderate)
This update also fixes the following bug :
- A bug in the GFS2 code prevented glock work queues from freeing glock- related memory while the glock memory shrinker repeatedly queued a large number of demote requests, for example when performing a simultaneous backup of several live GFS2 volumes with a large file count. As a consequence, the glock work queues became overloaded which resulted in a high CPU usage and the GFS2 file systems being unresponsive for a significant amount of time. A patch has been applied to alleviate this problem by calling the yield() function after scheduling a certain amount of tasks on the glock work queues. The problem can now occur only with extremely high work loads.
The system must be rebooted for this update to take effect.
Solution
Update the affected packages.See Also
Plugin Details
Severity: Medium
ID: 70577
File Name: sl_20131022_kernel_on_SL5_x.nasl
Version: 1.6
Type: local
Agent: unix
Published: 10/24/2013
Updated: 1/14/2021
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.7
CVSS v2
Risk Factor: Medium
Base Score: 6
Vector: CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:P
Vulnerability Information
CPE: p-cpe:/a:fermilab:scientific_linux:kernel-debug, p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-xen-devel, p-cpe:/a:fermilab:scientific_linux:kernel-pae-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-pae-devel, p-cpe:/a:fermilab:scientific_linux:kernel-doc, x-cpe:/o:fermilab:scientific_linux, p-cpe:/a:fermilab:scientific_linux:kernel-debug-devel, p-cpe:/a:fermilab:scientific_linux:kernel-devel, p-cpe:/a:fermilab:scientific_linux:kernel-xen-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-headers, p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common, p-cpe:/a:fermilab:scientific_linux:kernel, p-cpe:/a:fermilab:scientific_linux:kernel-xen, p-cpe:/a:fermilab:scientific_linux:kernel-pae, p-cpe:/a:fermilab:scientific_linux:kernel-debug-debuginfo
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list
Patch Publication Date: 10/22/2013
Vulnerability Publication Date: 2/28/2013
Reference Information
CVE: CVE-2013-0343, CVE-2013-4299, CVE-2013-4345, CVE-2013-4368