Vulnerability Name:

CVE-2017-8903 (CCN-125482)

Assigned:2017-05-02
Published:2017-05-02
Updated:2019-10-03
Summary:Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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): High
Integrity (I): High
Availibility (A): High
8.4 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.3 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/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): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:7.2 High (CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
7.2 High (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Gain Privileges
References:Source: MITRE
Type: CNA
CVE-2017-8903

Source: BID
Type: UNKNOWN
98426

Source: CCN
Type: BID-98426
Xen CVE-2017-8903 Arbitrary Code Execution Vulnerability

Source: SECTRACK
Type: UNKNOWN
1038386

Source: CCN
Type: Xen Security Advisory XSA-213
x86: 64bit PV guest breakout via pagetable use-after-mode-change

Source: CONFIRM
Type: Vendor Advisory
https://blog.xenproject.org/2017/05/02/updates-on-xsa-213-xsa-214-and-xsa-215/

Source: XF
Type: UNKNOWN
xen-iret-hypercall-priv-esc(125482)

Source: GENTOO
Type: UNKNOWN
GLSA-201705-11

Source: CONFIRM
Type: Mitigation, Patch, Vendor Advisory
https://xenbits.xen.org/xsa/advisory-213.html

Vulnerable Configuration:Configuration 1:
  • cpe:/o:xen:xen:4.8.0:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.8.1:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:xensource:xen:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.trusty:def:20178903000
    V
    		CVE-2017-8903 on Ubuntu 14.04 LTS (trusty) - medium.
    2017-05-12
    oval:com.ubuntu.xenial:def:20178903000
    V
    		CVE-2017-8903 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-05-12
    oval:com.ubuntu.xenial:def:201789030000000
    V
    		CVE-2017-8903 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-05-11
    BACK
    xen xen 4.8.0
    xen xen 4.8.1
    xensource xen *