ID CVE-2011-2519
Summary Xen in the Linux kernel, when running a guest on a host without hardware assisted paging (HAP), allows guest users to cause a denial of service (invalid pointer dereference and hypervisor crash) via the SAHF instruction.
References
Vulnerable Configurations
  • Red Hat Enterprise Linux 5
    cpe:2.3:o:redhat:enterprise_linux:5
  • Linux Kernel
    cpe:2.3:o:linux:linux_kernel
CVSS
Base: 5.2 (as of 27-12-2013 - 10:35)
Impact:
Exploitability:
Access
VectorComplexityAuthentication
ADJACENT_NETWORK MEDIUM SINGLE_INSTANCE
Impact
ConfidentialityIntegrityAvailability
NONE NONE COMPLETE
nessus via4
  • NASL family VMware ESX Local Security Checks
    NASL id VMWARE_VMSA-2012-0001.NASL
    description a. ESX third-party update for Service Console kernel The ESX Service Console Operating System (COS) kernel is updated to kernel-2.6.18-274.3.1.el5 to fix multiple security issues in the COS kernel. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CVE-2011-0726, CVE-2011-1078, CVE-2011-1079, CVE-2011-1080, CVE-2011-1093, CVE-2011-1163, CVE-2011-1166, CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, CVE-2011-1494, CVE-2011-1495, CVE-2011-1577, CVE-2011-1763, CVE-2010-4649, CVE-2011-0695, CVE-2011-0711, CVE-2011-1044, CVE-2011-1182, CVE-2011-1573, CVE-2011-1576, CVE-2011-1593, CVE-2011-1745, CVE-2011-1746, CVE-2011-1776, CVE-2011-1936, CVE-2011-2022, CVE-2011-2213, CVE-2011-2492, CVE-2011-1780, CVE-2011-2525, CVE-2011-2689, CVE-2011-2482, CVE-2011-2491, CVE-2011-2495, CVE-2011-2517, CVE-2011-2519, CVE-2011-2901 to these issues. b. ESX third-party update for Service Console cURL RPM The ESX Service Console (COS) curl RPM is updated to cURL-7.15.5.9 resolving a security issues. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-2192 to this issue. c. ESX third-party update for Service Console nspr and nss RPMs The ESX Service Console (COS) nspr and nss RPMs are updated to nspr-4.8.8-1.el5_7 and nss-3.12.10-4.el5_7 respectively resolving a security issues. A Certificate Authority (CA) issued fraudulent SSL certificates and Netscape Portable Runtime (NSPR) and Network Security Services (NSS) contain the built-in tokens of this fraudulent Certificate Authority. This update renders all SSL certificates signed by the fraudulent CA as untrusted for all uses. d. ESX third-party update for Service Console rpm RPMs The ESX Service Console Operating System (COS) rpm packages are updated to popt-1.10.2.3-22.el5_7.2, rpm-4.4.2.3-22.el5_7.2, rpm-libs-4.4.2.3-22.el5_7.2 and rpm-python-4.4.2.3-22.el5_7.2 which fixes multiple security issues. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CVE-2010-2059 and CVE-2011-3378 to these issues. e. ESX third-party update for Service Console samba RPMs The ESX Service Console Operating System (COS) samba packages are updated to samba-client-3.0.33-3.29.el5_7.4, samba-common-3.0.33-3.29.el5_7.4 and libsmbclient-3.0.33-3.29.el5_7.4 which fixes multiple security issues in the Samba client. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CVE-2010-0547, CVE-2010-0787, CVE-2011-1678, CVE-2011-2522 and CVE-2011-2694 to these issues. Note that ESX does not include the Samba Web Administration Tool (SWAT) and therefore ESX COS is not affected by CVE-2011-2522 and CVE-2011-2694. f. ESX third-party update for Service Console python package The ESX Service Console (COS) python package is updated to 2.4.3-44 which fixes multiple security issues. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CVE-2009-3720, CVE-2010-3493, CVE-2011-1015 and CVE-2011-1521 to these issues. g. ESXi update to third-party component python The python third-party library is updated to python 2.5.6 which fixes multiple security issues. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CVE-2009-3560, CVE-2009-3720, CVE-2010-1634, CVE-2010-2089, and CVE-2011-1521 to these issues.
    last seen 2019-02-21
    modified 2018-09-06
    plugin id 57749
    published 2012-01-31
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=57749
    title VMSA-2012-0001 : VMware ESXi and ESX updates to third-party library and ESX Service Console
  • NASL family Misc.
    NASL id VMWARE_VMSA-2012-0001_REMOTE.NASL
    description The remote VMware ESX / ESXi host is missing a security-related patch. It is, therefore, affected by multiple vulnerabilities, including remote code execution vulnerabilities, in several third-party libraries : - COS kernel - cURL - python - rpm
    last seen 2019-02-21
    modified 2018-08-16
    plugin id 89105
    published 2016-03-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89105
    title VMware ESX / ESXi Service Console and Third-Party Libraries Multiple Vulnerabilities (VMSA-2012-0001) (remote check)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20110906_KERNEL_ON_SL5_X.NASL
    description 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) 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.
    last seen 2019-02-21
    modified 2018-12-31
    plugin id 61132
    published 2012-08-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61132
    title Scientific Linux Security Update : kernel on SL5.x i386/x86_64
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2011-1212.NASL
    description From Red Hat Security Advisory 2011:1212 : Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 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.
    last seen 2019-02-21
    modified 2015-12-01
    plugin id 68334
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=68334
    title Oracle Linux 5 : kernel (ELSA-2011-1212)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2011-1813.NASL
    description Updated kernel packages that fix several security issues and various bugs are now available for Red Hat Enterprise Linux 5.6 Extended Update Support. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. These packages contain the Linux kernel. This update fixes the following security issues : * A flaw in the Stream Control Transmission Protocol (SCTP) implementation could allow a remote attacker to cause a denial of service by sending a specially crafted SCTP packet to a target system. (CVE-2011-2482, Important) If you do not run applications that use SCTP, you can prevent the sctp module from being loaded by adding the following to the end of the '/etc/modprobe.d/blacklist.conf' file : blacklist sctp This way, the sctp module cannot be loaded accidentally, which may occur if an application that requires SCTP is started. A reboot is not necessary for this change to take effect. * A flaw in the client-side NFS Lock Manager (NLM) implementation could allow a local, unprivileged user to cause a denial of service. (CVE-2011-2491, Important) * Flaws in the netlink-based wireless configuration interface 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) * A flaw in the __addr_ok() macro in the Linux kernel's Xen hypervisor implementation when running on 64-bit systems could allow a privileged guest user to crash the hypervisor. (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 the following bugs : * On Broadcom PCI cards that use the tg3 driver, the operational state of a network device, represented by the value in '/sys/class/net/ethX/operstate', was not initialized by default. Consequently, the state was reported as 'unknown' when the tg3 network device was actually in the 'up' state. This update modifies the tg3 driver to properly set the operstate value. (BZ#744699) * A KVM (Kernel-based Virtual Machine) guest can get preempted by the host, when a higher priority process needs to run. When a guest is not running for several timer interrupts in a row, ticks could be lost, resulting in the jiffies timer advancing slower than expected and timeouts taking longer than expected. To correct for the issue of lost ticks, do_timer_tsc_timekeeping() checks a reference clock source (kvm-clock when running as a KVM guest) to see if timer interrupts have been missed. If so, jiffies is incremented by the number of missed timer interrupts, ensuring that programs are woken up on time. (BZ#747874) * When a block device object was allocated, the bd_super field was not being explicitly initialized to NULL. Previously, users of the block device object could set bd_super to NULL when the object was released by calling the kill_block_super() function. Certain third-party file systems do not always use this function, and bd_super could therefore become uninitialized when the object was allocated again. This could cause a kernel panic in the blkdev_releasepage() function, when the uninitialized bd_super field was dereferenced. Now, bd_super is properly initialized in the bdget() function, and the kernel panic no longer occurs. (BZ#751137)
    last seen 2019-02-21
    modified 2014-08-18
    plugin id 64015
    published 2013-01-24
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=64015
    title RHEL 5 : kernel (RHSA-2011:1813)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2011-1212.NASL
    description Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 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.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 56271
    published 2011-09-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=56271
    title CentOS 5 : kernel (CESA-2011:1212)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2011-1212.NASL
    description Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 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.
    last seen 2019-02-21
    modified 2018-12-20
    plugin id 56110
    published 2011-09-07
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=56110
    title RHEL 5 : kernel (RHSA-2011:1212)
redhat via4
advisories
rhsa
id RHSA-2011:1212
rpms
  • kernel-0:2.6.18-274.3.1.el5
  • kernel-PAE-0:2.6.18-274.3.1.el5
  • kernel-PAE-devel-0:2.6.18-274.3.1.el5
  • kernel-debug-0:2.6.18-274.3.1.el5
  • kernel-debug-devel-0:2.6.18-274.3.1.el5
  • kernel-devel-0:2.6.18-274.3.1.el5
  • kernel-doc-0:2.6.18-274.3.1.el5
  • kernel-headers-0:2.6.18-274.3.1.el5
  • kernel-kdump-0:2.6.18-274.3.1.el5
  • kernel-kdump-devel-0:2.6.18-274.3.1.el5
  • kernel-xen-0:2.6.18-274.3.1.el5
  • kernel-xen-devel-0:2.6.18-274.3.1.el5
refmap via4
confirm https://bugzilla.redhat.com/show_bug.cgi?id=718882
misc http://xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644
mlist [oss-security] 20130830 kernel: CVE-2011-2482/2519
vmware via4
description The ESX Service Console Operating System (COS) kernel is updated to kernel-2.6.18-274.3.1.el5 to fix multiple security issues in the COS kernel.
id VMSA-2012-0001
last_updated 2012-03-29T00:00:00
published 2012-01-30T00:00:00
title ESX third party update for Service Console kernel
Last major update 27-12-2013 - 10:35
Published 26-12-2013 - 20:55
Back to Top