CVE-2016-9379

Severity CVSS v4.0:

Pending analysis

Type:

CWE-20 Input Validation

Publication date:

23/01/2017

Last modified:

20/04/2025

Description

The pygrub boot loader emulator in Xen, when S-expression output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via string quotes and S-expressions in the bootloader configuration file.

Impact

Vector 3.x

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.90 HIGH
Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x

7.90

Severity 3.x

HIGH

Vector 2.0

AV:L/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.60 MEDIUM
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

4.60

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:xen:xen::::::::
cpe:2.3:a:citrix:xenserver:6.0.2:::::::*
cpe:2.3:a:citrix:xenserver:6.2.0:::::::*
cpe:2.3:a:citrix:xenserver:6.5:::::::*
cpe:2.3:a:citrix:xenserver:7.0:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:o:xen:xen::::::::
cpe:2.3:a:citrix:xenserver:6.0.2:::::::*
cpe:2.3:a:citrix:xenserver:6.2.0:::::::*
cpe:2.3:a:citrix:xenserver:6.5:::::::*
cpe:2.3:a:citrix:xenserver:7.0:::::::*

CVE-2016-9379

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools