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FreeBSD : xrdb -- root hole via rogue hostname (2eccb24f-61c0-11e0-b199-0015f2db7bde)

high Nessus Plugin ID 53439

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Synopsis

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

Description

Matthias Hopf reports :

By crafting hostnames with shell escape characters, arbitrary commands can be executed in a root environment when a display manager reads in the resource database via xrdb.

These specially crafted hostnames can occur in two environments :

Systems are affected are: systems set their hostname via DHCP, and the used DHCP client allows setting of hostnames with illegal characters.
And systems that allow remote logins via xdmcp.

Solution

Update the affected package.

See Also

http://www.nessus.org/u?e176957e

http://www.nessus.org/u?67a56bbd

Plugin Details

Severity: High

ID: 53439

File Name: freebsd_pkg_2eccb24f61c011e0b1990015f2db7bde.nasl

Version: 1.9

Type: local

Published: 4/15/2011

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 9.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:xrdb, cpe:/o:freebsd:freebsd

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

Patch Publication Date: 4/14/2011

Vulnerability Publication Date: 4/5/2011

Reference Information

CVE: CVE-2011-0465

IAVA: 2017-A-0098