Vulnerability Name:

CVE-2011-2901 (CCN-69487)

Assigned:2011-08-30
Published:2011-08-30
Updated:2023-02-13
Summary:Off-by-one error in the __addr_ok macro in Xen 3.3 and earlier allows local 64 bit PV guest administrators to cause a denial of service (host crash) via unspecified hypercalls that ignore virtual-address bits.
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)
3.9 Low (Temporal CVSS v2 Vector: AV:A/AC:L/Au:S/C:N/I:N/A:C/E:U/RL:OF/RC:UR)
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)
1.5 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:UR)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.5 Medium (REDHAT CVSS v2 Vector: AV:A/AC:L/Au:S/C:N/I:N/A:C)
3.9 Low (REDHAT Temporal CVSS v2 Vector: AV:A/AC:L/Au:S/C:N/I:N/A:C/E:U/RL:OF/RC:UR)
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
Vulnerability Type:CWE-193
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2011-2901

Source: CCN
Type: Xen XSA-4
Xen

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

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

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

Source: CCN
Type: SA45835
Xen "__addr_ok()" Macro Input Validation Weakness

Source: CCN
Type: SA45880
Citrix XenServer Multiple Vulnerabilities

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: CCN
Type: CTX130325
Citrix XenServer Multiple Security Updates

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: CCN
Type: OSVDB ID: 74873
Xen x86_64__addr_ok() Macro Off-by-one Unprivileged Local Host DoS

Source: CCN
Type: OSVDB ID: 75168
Xen xen/include/asm-x86/x86_64/uaccess.h __addr_ok() Macro Input Validation Local DoS

Source: CCN
Type: BID-49370
Xen 'x86_64 __addr_ok()' Local Denial Of Service Vulnerability

Source: CCN
Type: Red Hat Bugzilla Bug 728042
CVE-2011-2901 kernel: xen: off-by-one shift in x86_64 __addr_ok()

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: XF
Type: UNKNOWN
xen-x8664addrok-dos(69487)

Vulnerable Configuration: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:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.0:*:*:*:*:*:*:*
  • AND
  • cpe:/o:redhat:enterprise_linux:5:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux:5:*:client:*:*:*:*:*
  • OR cpe:/a:citrix:xenserver:5.5:*:*:*:*:*:*:*
  • OR cpe:/a:citrix:xenserver:5.0:*:*:*:*:*:*:*
  • OR cpe:/a:citrix:xenserver:5.6:*:*:*:*:*:*:*
  • 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.opensuse.security:def:20112901
    V
    		CVE-2011-2901
    2017-09-27
    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:20229
    V
    		VMware ESXi and ESX updates to third party library and ESX Service Console
    2014-01-20
    oval:com.ubuntu.precise:def:20112901000
    V
    		CVE-2011-2901 on Ubuntu 12.04 LTS (precise) - medium.
    2013-10-01
    oval:com.redhat.rhsa:def:20111212
    P
    		RHSA-2011:1212: kernel security and bug fix update (Important)
    2011-09-06
    BACK
    xensource xen 3.0.3
    xensource xen 3.1.2
    xensource xen 3.0
    xensource xen 4.0
    redhat enterprise linux 5
    redhat enterprise linux 5
    citrix xenserver 5.5
    citrix xenserver 5.0
    citrix xenserver 5.6
    redhat enterprise linux eus 5.6.z
    redhat enterprise linux long life 5.6