CVE-2016-9379

7.9 HIGH
Published: January 23, 2017 Modified: May 13, 2026
View on NVD

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://www.securityfocus.com/bid/94473
Source: cve@mitre.org
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037347
Source: cve@mitre.org
Third Party Advisory VDB Entry
http://xenbits.xen.org/xsa/advisory-198.html
Source: cve@mitre.org
Patch Vendor Advisory
http://xenbits.xen.org/xsa/xsa198.patch
Source: cve@mitre.org
Patch Vendor Advisory
https://support.citrix.com/article/CTX218775
Source: cve@mitre.org
Patch Third Party Advisory
http://www.securityfocus.com/bid/94473
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037347
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://xenbits.xen.org/xsa/advisory-198.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Vendor Advisory
http://xenbits.xen.org/xsa/xsa198.patch
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Vendor Advisory
https://security.gentoo.org/glsa/201612-56
Source: af854a3a-2127-422b-91ae-364da2661108
https://support.citrix.com/article/CTX218775
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory

12 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.9 / 10.0
EPSS (Exploit Probability)
0.4%
35th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

citrix xen