Vulnerability Name:

CVE-2011-2521 (CCN-68407)

Assigned:2011-03-19
Published:2011-03-19
Updated:2023-02-13
Summary:The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in the Linux kernel before 2.6.39 does not properly calculate counter values, which allows local users to cause a denial of service (panic) via the perf program.
CVSS v3 Severity:6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
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): High
CVSS v2 Severity:4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
3.7 Low (Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
3.7 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C/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): Complete
4.9 Medium (REDHAT CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
3.7 Low (REDHAT Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2011-2521

Source: secalert@redhat.com
Type: Broken Link
secalert@redhat.com

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

Source: CCN
Type: Linux Kernel GIT Repository
perf, x86: Fix Intel fixed counters base initialization

Source: CCN
Type: RHSA-2011-1350
Important: kernel security, bug fix, and enhancement update

Source: secalert@redhat.com
Type: Mailing List, Third Party Advisory
secalert@redhat.com

Source: CCN
Type: OSVDB ID: 76177
Linux Kernel Performance Events NMI Watchdog Local DoS

Source: CCN
Type: BID-48580
Linux Kernel 'x86_assign_hw_event()' Local Denial of Service Vulnerability

Source: secalert@redhat.com
Type: Issue Tracking, Third Party Advisory
secalert@redhat.com

Source: XF
Type: UNKNOWN
kernel-x86assignhwevent-dos(68407)

Source: secalert@redhat.com
Type: Patch, Third Party Advisory
secalert@redhat.com

Vulnerable Configuration:Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:6:*:*:*:*:*:*:*
    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:6::server:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:2.6.38:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:2.6.38.2:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:2.6.38.3:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:2.6.38.4:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:2.6.38.6:*:*:*:*:*:*:*
  • AND
  • cpe:/o:redhat:enterprise_linux:6:*:server:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux:6:*:workstation:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_desktop:6:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_hpc_node:6:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_server_eus:6.1.z:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.mitre.oval:def:23620
    P
    		ELSA-2011:1350: kernel security, bug fix, and enhancement update (Important)
    2014-05-26
    oval:org.mitre.oval:def:21992
    P
    		RHSA-2011:1350: kernel security, bug fix, and enhancement update (Important)
    2014-02-24
    oval:com.redhat.rhsa:def:20111350
    P
    		RHSA-2011:1350: kernel security, bug fix, and enhancement update (Important)
    2011-10-05
    BACK
    linux linux kernel 2.6.38
    linux linux kernel 2.6.38.2
    linux linux kernel 2.6.38.3
    linux linux kernel 2.6.38.4
    linux linux kernel 2.6.38.6
    redhat enterprise linux 6
    redhat enterprise linux 6
    redhat enterprise linux desktop 6
    redhat enterprise linux hpc node 6
    redhat enterprise linux server eus 6.1.z