Vulnerability Name:

CVE-2011-2519 (CCN-69511)

Assigned:2011-08-30
Published:2011-08-30
Updated:2020-12-08
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.
CVSS v3 Severity:4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:5.5 Medium (CVSS v2 Vector: AV:A/AC:L/Au:S/C:N/I:N/A:C)
4.1 Medium (Temporal CVSS v2 Vector: AV:A/AC:L/Au:S/C:N/I:N/A:C/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
1.6 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.2 Medium (REDHAT CVSS v2 Vector: AV:A/AC:M/Au:S/C:N/I:N/A:C)
3.8 Low (REDHAT Temporal CVSS v2 Vector: AV:A/AC:M/Au:S/C:N/I:N/A:C/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Medium
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-476
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2011-2519

Source: CCN
Type: XenSource Web site
Xen

Source: CCN
Type: RHSA-2011-1212
Important: kernel security and bug fix update

Source: REDHAT
Type: Third Party Advisory
RHSA-2011:1212

Source: CCN
Type: RHSA-2011-1813
Important: kernel security and bug fix update

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20130830 kernel: CVE-2011-2482/2519

Source: CCN
Type: OSVDB ID: 75241
Linux Kernel SAHF Instruction Emulation Remote DoS

Source: CCN
Type: BID-49375
Xen SAHF Emulation Denial of Service Vulnerability

Source: MISC
Type: Patch, Vendor Advisory
http://xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644

Source: CCN
Type: Red Hat Bugzilla Bug 718882
CVE-2011-2519 kernel: xen: x86_emulate: fix SAHF emulation

Source: CONFIRM
Type: Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=718882

Source: XF
Type: UNKNOWN
xen-sahf-dos(69511)

Vulnerable Configuration:Configuration 1:
  • cpe:/o:xen:xen:*:*:*:*:*:*:*:* (Version < 3.3.0)

    • Configuration 2:
  • cpe:/o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:5:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:5::client:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:5::server:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:xensource:xen:3.0.3:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:3.1.2:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:3.0:*:*:*:*:*:*:*
  • AND
  • cpe:/o:redhat:enterprise_linux:5:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux:5:*:client:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_eus:5.6.z::server:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_long_life:5.6:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.mitre.oval:def:23293
    P
    		ELSA-2011:1212: kernel security and bug fix update (Important)
    2014-05-26
    oval:org.mitre.oval:def:21200
    P
    		RHSA-2011:1212: kernel security and bug fix update (Important)
    2014-02-24
    oval:org.mitre.oval:def:20423
    V
    		VMware ESXi and ESX updates to third party library and ESX Service Console
    2014-01-20
    oval:com.ubuntu.precise:def:20112519000
    V
    		CVE-2011-2519 on Ubuntu 12.04 LTS (precise) - medium.
    2013-12-26
    oval:com.redhat.rhsa:def:20111212
    P
    		RHSA-2011:1212: kernel security and bug fix update (Important)
    2011-09-06
    BACK
    xen xen *
    redhat enterprise linux desktop 5.0
    redhat enterprise linux server 5.0
    redhat enterprise linux workstation 5.0
    xensource xen 3.0.3
    xensource xen 3.1.2
    xensource xen 3.0
    redhat enterprise linux 5
    redhat enterprise linux 5
    redhat enterprise linux eus 5.6.z
    redhat enterprise linux long life 5.6