Test Kennung:	1.3.6.1.4.1.25623.1.0.702469
Kategorie:	Debian Local Security Checks
Titel:	Debian Security Advisory DSA 2469-1 (linux-2.6 - privilege escalation/denial of service)
Zusammenfassung:	Several vulnerabilities have been discovered in the Linux kernel that may lead;to a denial of service or privilege escalation. The Common Vulnerabilities and;Exposures project identifies the following problems:;;CVE-2011-4086Eric Sandeen reported an issue in the journaling layer for ext4 filesystems;(jbd2). Local users can cause buffers to be accessed after they have been;torn down, resulting in a denial of service (DoS) due to a system crash.;;CVE-2012-0879Louis Rilling reported two reference counting issues in the CLONE_IO;feature of the kernel. Local users can prevent io context structures;from being freed, resulting in a denial of service.;;CVE-2012-1601Michael Ellerman reported an issue in the KVM subsystem. Local users could;cause a denial of service (NULL pointer dereference) by creating VCPUs;before a call to KVM_CREATE_IRQCHIP.;;CVE-2012-2123Steve Grubb reported an issue in fcaps, a filesystem-based capabilities;system. Personality flags set using this mechanism, such as the disabling;of address space randomization, may persist across suid calls.;;CVE-2012-2133Shachar Raindel discovered a use-after-free bug in the hugepages;quota implementation. Local users with permission to use hugepages;via the hugetlbfs implementation may be able to cause a denial of;service (system crash).
Beschreibung:	Summary: Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2011-4086Eric Sandeen reported an issue in the journaling layer for ext4 filesystems (jbd2). Local users can cause buffers to be accessed after they have been torn down, resulting in a denial of service (DoS) due to a system crash. CVE-2012-0879Louis Rilling reported two reference counting issues in the CLONE_IO feature of the kernel. Local users can prevent io context structures from being freed, resulting in a denial of service. CVE-2012-1601Michael Ellerman reported an issue in the KVM subsystem. Local users could cause a denial of service (NULL pointer dereference) by creating VCPUs before a call to KVM_CREATE_IRQCHIP. CVE-2012-2123Steve Grubb reported an issue in fcaps, a filesystem-based capabilities system. Personality flags set using this mechanism, such as the disabling of address space randomization, may persist across suid calls. CVE-2012-2133Shachar Raindel discovered a use-after-free bug in the hugepages quota implementation. Local users with permission to use hugepages via the hugetlbfs implementation may be able to cause a denial of service (system crash). Affected Software/OS: linux-2.6 on Debian Linux Solution: For the stable distribution (squeeze), this problem has been fixed in version 2.6.32-44. Updates are currently only available for the amd64, i386 and sparc ports. Note: updated linux-2.6 packages will also be made available in the release of Debian 6.0.5, scheduled to take place the weekend of 2012.05.12. This pending update will be version 2.6.32-45, and provides an additional fix for build failures on some architectures. Users for whom this update is not critical, and who may wish to avoid multiple reboots, should consider waiting for the 6.0.5 release before updating, or installing the 2.6.32-45 version ahead of time from proposed-updates. The following matrix lists additional source packages that were rebuilt for compatibility with or to take advantage of this update:  Debian 6.0 (squeeze)user-mode-linux2.6.32-1um-4+44We recommend that you upgrade your linux-2.6 and user-mode-linux packages. CVSS Score: 7.2 CVSS Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C
Querverweis:	Common Vulnerability Exposure (CVE) ID: CVE-2012-2133 BugTraq ID: 53233 http://www.securityfocus.com/bid/53233 Debian Security Information: DSA-2469 (Google Search) http://www.debian.org/security/2012/dsa-2469 http://www.openwall.com/lists/oss-security/2012/04/24/12 SuSE Security Announcement: SUSE-SU-2012:0616 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html XForce ISS Database: linux-kernel-hugepages-dos(75168) https://exchange.xforce.ibmcloud.com/vulnerabilities/75168 Common Vulnerability Exposure (CVE) ID: CVE-2012-1601 http://www.openwall.com/lists/oss-security/2012/03/30/1 RedHat Security Advisories: RHSA-2012:0571 http://rhn.redhat.com/errata/RHSA-2012-0571.html RedHat Security Advisories: RHSA-2012:0676 http://rhn.redhat.com/errata/RHSA-2012-0676.html http://www.securitytracker.com/id?1026897 http://secunia.com/advisories/49928 SuSE Security Announcement: SUSE-SU-2012:1679 (Google Search) https://www.suse.com/support/update/announcement/2012/suse-su-20121679-1.html SuSE Security Announcement: openSUSE-SU-2013:0925 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html Common Vulnerability Exposure (CVE) ID: CVE-2012-0879 HPdes Security Advisory: HPSBGN02970 http://marc.info/?l=bugtraq&m=139447903326211&w=2 http://www.openwall.com/lists/oss-security/2012/02/23/5 RedHat Security Advisories: RHSA-2012:0481 http://rhn.redhat.com/errata/RHSA-2012-0481.html RedHat Security Advisories: RHSA-2012:0531 http://rhn.redhat.com/errata/RHSA-2012-0531.html http://www.securitytracker.com/id?1027086 http://secunia.com/advisories/48545 http://secunia.com/advisories/48842 http://www.ubuntu.com/usn/USN-1408-1 http://www.ubuntu.com/usn/USN-1410-1 http://www.ubuntu.com/usn/USN-1411-1 Common Vulnerability Exposure (CVE) ID: CVE-2011-4086 RedHat Security Advisories: RHSA-2012:0670 http://rhn.redhat.com/errata/RHSA-2012-0670.html http://secunia.com/advisories/48898 http://secunia.com/advisories/48964 SuSE Security Announcement: SUSE-SU-2012:0554 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html Common Vulnerability Exposure (CVE) ID: CVE-2012-2123 BugTraq ID: 53166 http://www.securityfocus.com/bid/53166 http://www.openwall.com/lists/oss-security/2012/04/20/6 RedHat Security Advisories: RHSA-2012:0743 http://rhn.redhat.com/errata/RHSA-2012-0743.html http://www.securitytracker.com/id?1027072 XForce ISS Database: linux-kernel-fcaps-sec-bypass(75043) https://exchange.xforce.ibmcloud.com/vulnerabilities/75043
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