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GLSA-201702-23 : Dropbear: Multiple vulnerabilities

critical Nessus Plugin ID 97266

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Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-201702-23 (Dropbear: Multiple vulnerabilities)

 Multiple vulnerabilities have been discovered in Dropbear. Please review the CVE identifiers referenced below for details.
 Impact :

 A remote attacker could possibly execute arbitrary code with root privileges if usernames containing special characters can be created on a system. Also, a dbclient user who can control username or host arguments could potentially run arbitrary code with the privileges of the process.
 In addition, a remote attacker could entice a user to process a specially crafted SSH key using dropbearconvert, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.
 Workaround :

 There is no known workaround at this time.

Solution

All Dropbear users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/dropbear-2016.74'

See Also

https://security.gentoo.org/glsa/201702-23

Plugin Details

Severity: Critical

ID: 97266

File Name: gentoo_GLSA-201702-23.nasl

Version: 3.3

Type: local

Published: 2/21/2017

Updated: 1/11/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:dropbear, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 2/20/2017

Reference Information

CVE: CVE-2016-7406, CVE-2016-7407, CVE-2016-7408, CVE-2016-7409

GLSA: 201702-23