Vulnerability Monitor

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CVE-2016-9379

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.

Published

2017-01-23T21:59:02.707

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.9 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:P/A:P

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

6.4

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	xen	xen	*	Yes
Application	citrix	xenserver	6.0.2	Yes
Application	citrix	xenserver	6.2.0	Yes
Application	citrix	xenserver	6.5	Yes
Application	citrix	xenserver	7.0	Yes

References

http://www.securityfocus.com/bid/94473 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1037347 Third Party Advisory, VDB Entry ([email protected])
http://xenbits.xen.org/xsa/advisory-198.html Patch, Vendor Advisory ([email protected])
http://xenbits.xen.org/xsa/xsa198.patch Patch, Vendor Advisory ([email protected])
https://security.gentoo.org/glsa/201612-56 ([email protected])
https://support.citrix.com/article/CTX218775 Patch, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/94473 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1037347 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xen.org/xsa/advisory-198.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xen.org/xsa/xsa198.patch Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201612-56 (af854a3a-2127-422b-91ae-364da2661108)
https://support.citrix.com/article/CTX218775 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)