FreeBSD : asterisk -- Remote Crash Vulnerability in audio transcoding (7d53d8da-d07a-11e9-8f1a-001999f8d30b)

high Nessus Plugin ID 128586

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The Asterisk project reports :

When audio frames are given to the audio transcoding support in Asterisk the number of samples are examined and as part of this a message is output to indicate that no samples are present. A change was done to suppress this message for a particular scenario in which the message was not relevant. This change assumed that information about the origin of a frame will always exist when in reality it may not.

This issue presented itself when an RTP packet containing no audio (and thus no samples) was received. In a particular transcoding scenario this audio frame would get turned into a frame with no origin information. If this new frame was then given to the audio transcoding support a crash would occur as no samples and no origin information would be present. The transcoding scenario requires the genericplc option to be set to enabled (the default) and a transcoding path from the source format into signed linear and then from signed linear into another format.

Note that there may be other scenarios that have not been found which can cause an audio frame with no origin to be given to the audio transcoding support and thus cause a crash.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 128586

File Name: freebsd_pkg_7d53d8dad07a11e98f1a001999f8d30b.nasl

Version: 1.5

Type: local

Family: FreeBSD Local Security Checks

Published: 9/9/2019

Updated: 4/26/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2019-15639

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:asterisk13, p-cpe:/a:freebsd:freebsd:asterisk16, cpe:/o:freebsd:freebsd

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/6/2019

Vulnerability Publication Date: 8/7/2019

Reference Information

CVE: CVE-2019-15639

Detections

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