FreeBSD : xen-tools -- delimiter injection vulnerabilities in pygrub (59f79c99-ba4d-11e6-ae1b-002590263bf5)

high Nessus Plugin ID 95511

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Synopsis

The remote FreeBSD host is missing a security-related update.

Description

The Xen Project reports :

pygrub, the boot loader emulator, fails to quote (or sanity check) its results when reporting them to its caller.

A malicious guest administrator can obtain the contents of sensitive host files (an information leak). Additionally, a malicious guest administrator can cause files on the host to be removed, causing a denial of service. In some unusual host configurations, ability to remove certain files may be usable for privilege escalation.

Solution

Update the affected package.

See Also

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214936

https://xenbits.xen.org/xsa/advisory-198.html

http://www.nessus.org/u?9e5aab6a

Plugin Details

Severity: High

ID: 95511

File Name: freebsd_pkg_59f79c99ba4d11e6ae1b002590263bf5.nasl

Version: 3.6

Type: local

Published: 12/5/2016

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

CVSS v2

Risk Factor: Medium

Base Score: 4.6

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

CVSS v3

Risk Factor: High

Base Score: 7.9

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:xen-tools, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 12/4/2016

Vulnerability Publication Date: 11/22/2016

Reference Information

CVE: CVE-2016-9379, CVE-2016-9380