Test ID:	1.3.6.1.4.1.25623.1.0.880995
Category:	CentOS Local Security Checks
Title:	CentOS Update for kernel CESA-2011:1212 centos5 i386
Summary:	The remote host is missing an update for the 'kernel'; package(s) announced via the referenced advisory.
Description:	Summary: The remote host is missing an update for the 'kernel' package(s) announced via the referenced advisory. Vulnerability Insight: The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issues: * A NULL pointer dereference flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. A remote attacker could send a specially-crafted SCTP packet to a target system, resulting in a denial of service. (CVE-2011-2482, Important) * A flaw in the Linux kernel's client-side NFS Lock Manager (NLM) implementation could allow a local, unprivileged user to cause a denial of service. (CVE-2011-2491, Important) * Buffer overflow flaws in the Linux kernel's netlink-based wireless configuration interface implementation could allow a local user, who has the CAP_NET_ADMIN capability, to cause a denial of service or escalate their privileges on systems that have an active wireless interface. (CVE-2011-2517, Important) * A flaw was found in the way the Linux kernel's Xen hypervisor implementation emulated the SAHF instruction. When using a fully-virtualized guest on a host that does not use hardware assisted paging (HAP), such as those running CPUs that do not have support for (or those that have it disabled) Intel Extended Page Tables (EPT) or AMD Virtualization (AMD-V) Rapid Virtualization Indexing (RVI), a privileged guest user could trigger this flaw to cause the hypervisor to crash. (CVE-2011-2519, Moderate) * An off-by-one flaw was found in the __addr_ok() macro in the Linux kernel's Xen hypervisor implementation when running on 64-bit systems. A privileged guest user could trigger this flaw to cause the hypervisor to crash. (CVE-2011-2901, Moderate) * /proc/[PID]/io is world-readable by default. Previously, these files could be read without any further restrictions. A local, unprivileged user could read these files, belonging to other, possibly privileged processes to gather confidential information, such as the length of a password used in a process. (CVE-2011-2495, Low) Red Hat would like to thank Vasily Averin for reporting CVE-2011-2491, and Vasiliy Kulikov of Openwall for reporting CVE-2011-2495. This update also fixes several bugs. Documentation for these bug fixes will be available shortly from the Technical Notes document linked to in the References section. Users should upgrade to these updated packages, which contain backported patches to correct these issues, and fix the bugs noted in the Technical Notes. The system must be rebooted for this update to take effect. Affected Software/OS: kernel on CentOS 5 Solution: Please install the updated packages. CVSS Score: 7.8 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2011-2482 RHSA-2011:1212 http://rhn.redhat.com/errata/RHSA-2011-1212.html [oss-security] 20110830 kernel: CVE-2011-2482/2519 http://www.openwall.com/lists/oss-security/2011/08/30/1 http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.21 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ea2bc483ff5caada7c4aa0d5fbf87d3a6590273d https://bugzilla.redhat.com/show_bug.cgi?id=714867 https://github.com/torvalds/linux/commit/ea2bc483ff5caada7c4aa0d5fbf87d3a6590273d Common Vulnerability Exposure (CVE) ID: CVE-2011-2491 [oss-security] 20110623 Re: CVE request: kernel: NLM: Don't hang forever on NLM unlock requests http://www.openwall.com/lists/oss-security/2011/06/23/6 http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0b760113a3a155269a3fba93a409c640031dd68f https://bugzilla.redhat.com/show_bug.cgi?id=709393 https://github.com/torvalds/linux/commit/0b760113a3a155269a3fba93a409c640031dd68f Common Vulnerability Exposure (CVE) ID: CVE-2011-2495 [oss-security] 20110627 Re: CVE request: kernel: taskstats/procfs io infoleak http://www.openwall.com/lists/oss-security/2011/06/27/1 http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.4 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1d1221f375c94ef961ba8574ac4f85c8870ddd51 https://bugzilla.redhat.com/show_bug.cgi?id=716825 https://github.com/torvalds/linux/commit/1d1221f375c94ef961ba8574ac4f85c8870ddd51 Common Vulnerability Exposure (CVE) ID: CVE-2011-2517 [oss-security] 20110701 Re: CVE request: kernel: nl80211: missing check for valid SSID size in scan operations http://www.openwall.com/lists/oss-security/2011/07/01/4 http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.2 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=208c72f4fe44fe09577e7975ba0e7fa0278f3d03 https://bugzilla.redhat.com/show_bug.cgi?id=718152 https://github.com/torvalds/linux/commit/208c72f4fe44fe09577e7975ba0e7fa0278f3d03 Common Vulnerability Exposure (CVE) ID: CVE-2011-2519 [oss-security] 20130830 kernel: CVE-2011-2482/2519 http://xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644 https://bugzilla.redhat.com/show_bug.cgi?id=718882 Common Vulnerability Exposure (CVE) ID: CVE-2011-2901 55082 http://secunia.com/advisories/55082 GLSA-201309-24 http://security.gentoo.org/glsa/glsa-201309-24.xml [oss-security] 20110902 Xen Security Advisory 4 (CVE-2011-2901) - Xen 3.3 vaddr validation http://www.openwall.com/lists/oss-security/2011/09/02/2 https://bugzilla.redhat.com/show_bug.cgi?id=728042
Copyright	Copyright (C) 2011 Greenbone AG

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