Vulnerability Name:

CVE-2017-14318

Assigned:2017-09-12
Published:2017-09-12
Updated:2017-11-14
Summary:An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct.
CVSS v3 Severity:6.5 Medium (CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/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): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.1 High (CCN CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
6.2 Medium (CCN Temporal CVSS v3 Vector: CVSS:3.0/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:4.9 Medium (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
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)
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-476
References:Source: BID
Type: VENDOR_ADVISORY
100817

Source: SECTRACK
Type: VENDOR_ADVISORY
1039349

Source: CONFIRM
Type: VENDOR_ADVISORY
http://xenbits.xen.org/xsa/advisory-232.html

Source: XF
Type: UNKNOWN
xen-cve201714318-dos(131775)

Source: CONFIRM
Type: UNKNOWN
https://support.citrix.com/article/CTX227185

Vulnerable Configuration:Configuration 1:
  • cpe:/o:xen:xen:4.5.0:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.5.1:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.5.2:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.5.3:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.5.5:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.0:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.1:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.3:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.4:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.5:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.6.6:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.7.0:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.7.1:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.7.2:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.7.3:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.8.0:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.8.1:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.9.0:*:*:*:*:*:*:*

  • Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:201714318
    V
    CVE-2017-14318
    2017-11-19
    oval:com.ubuntu.trusty:def:201714318000
    V
    CVE-2017-14318 on Ubuntu 14.04 LTS (trusty) - medium.
    2017-09-12
    oval:com.ubuntu.xenial:def:201714318000
    V
    CVE-2017-14318 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-09-12
    BACK
    xen xen 4.5.0
    xen xen 4.5.1
    xen xen 4.5.2
    xen xen 4.5.3
    xen xen 4.5.5
    xen xen 4.6.0
    xen xen 4.6.1
    xen xen 4.6.3
    xen xen 4.6.4
    xen xen 4.6.5
    xen xen 4.6.6
    xen xen 4.7.0
    xen xen 4.7.1
    xen xen 4.7.2
    xen xen 4.7.3
    xen xen 4.8.0
    xen xen 4.8.1
    xen xen 4.9.0