Vulnerability Name:

CVE-2017-10923 (CCN-127492)

Assigned:2017-06-20
Published:2017-06-20
Updated:2017-08-22
Summary:Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service (hypervisor crash), aka XSA-225.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.1 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
6.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A: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
Vulnerability Type:CWE-20
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-10923

Source: BID
Type: Tool Signature, VDB Entry
99160

Source: CCN
Type: BID-99160
Xen 'xen/arch/arm/vgic.c' Denial of Service Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1038735

Source: CCN
Type: Xen Security Advisory XSA-225
arm: vgic: Out-of-bound access when sending SGIs

Source: XF
Type: UNKNOWN
xen-generic-interrupt-dos(127492)

Source: GENTOO
Type: UNKNOWN
GLSA-201708-03

Source: CONFIRM
Type: Mailing List, Mitigation, Vendor Advisory
https://xenbits.xen.org/xsa/advisory-225.html

Vulnerable Configuration:Configuration 1:
  • cpe:/o:xen:xen:4.6.0:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.1:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.2:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.4:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.5:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.7.1:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.8.0:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.8.1:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:xensource:xen:4.6:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.7:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.8:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.xenial:def:2017109230000000
    V
    		CVE-2017-10923 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-07-05
    oval:com.ubuntu.trusty:def:201710923000
    V
    		CVE-2017-10923 on Ubuntu 14.04 LTS (trusty) - medium.
    2017-07-04
    oval:com.ubuntu.xenial:def:201710923000
    V
    		CVE-2017-10923 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-07-04
    BACK
    xen xen 4.6.0
    xen xen 4.6.1
    xen xen 4.6.2
    xen xen 4.6.4
    xen xen 4.6.5
    xen xen 4.7.1
    xen xen 4.8.0
    xen xen 4.8.1
    xensource xen 4.6
    xensource xen 4.7
    xensource xen 4.8