Debian DSA-3859-1 : dropbear - security update

high Nessus Plugin ID 100306

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Synopsis

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

Description

Two vulnerabilities were found in Dropbear, a lightweight SSH2 server and client :

- CVE-2017-9078 Mark Shepard discovered a double free in the TCP listener cleanup which could result in denial of service by an authenticated user if Dropbear is running with the '-a' option.

- CVE-2017-9079 Jann Horn discovered a local information leak in parsing the .authorized_keys file.

Solution

Upgrade the dropbear packages.

For the stable distribution (jessie), these problems have been fixed in version 2014.65-1+deb8u2.

Plugin Details

Severity: High

ID: 100306

File Name: debian_DSA-3859.nasl

Version: 3.10

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 5/22/2017

Updated: 12/18/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.12

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2017-9078

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:dropbear

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 5/19/2017

Reference Information

CVE: CVE-2017-9078, CVE-2017-9079

DSA: 3859

Detections

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