CVE-2016-9379

HIGH

Xen - Arbitrary File Read and Delete via pygrub Boot Loader S-expression Handling

Title source: llm
STIX 2.1

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.

References (6)

Core 6
Core References
Patch, Vendor Advisory x_refsource_confirm
http://xenbits.xen.org/xsa/xsa198.patch
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/94473
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201612-56
Patch, Vendor Advisory x_refsource_confirm
http://xenbits.xen.org/xsa/advisory-198.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1037347
Patch, Third Party Advisory x_refsource_confirm
https://support.citrix.com/article/CTX218775

Scores

CVSS v3 7.9
EPSS 0.0010
EPSS Percentile 27.4%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Details

CWE
CWE-20
Status published
Products (5)
citrix/xenserver 6.0.2
citrix/xenserver 6.2.0
citrix/xenserver 6.5
citrix/xenserver 7.0
xen/xen
Published Jan 23, 2017
Tracked Since Feb 18, 2026