FreeBSD : asterisk -- RTP/RTCP information leak (c2ea3b31-9d75-11e7-bb13-001999f8d30b)

Medium Nessus Plugin ID 103346

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VPR Score: 3.6

Synopsis

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

Description

The Asterisk project reports :

This is a follow up advisory to AST-2017-005.

Insufficient RTCP packet validation could allow reading stale buffer contents and when combined with the 'nat' and 'symmetric_rtp' options allow redirecting where Asterisk sends the next RTCP report.

The RTP stream qualification to learn the source address of media always accepted the first RTP packet as the new source and allowed what AST-2017-005 was mitigating. The intent was to qualify a series of packets before accepting the new source address.

The RTP/RTCP stack will now validate RTCP packets before processing them.

Solution

Update the affected packages.

See Also

https://downloads.asterisk.org/pub/security/AST-2017-008.html

http://www.nessus.org/u?b8702a18

Plugin Details

Severity: Medium

ID: 103346

File Name: freebsd_pkg_c2ea3b319d7511e7bb13001999f8d30b.nasl

Version: 3.6

Type: local

Published: 2017/09/20

Updated: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 5

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

CVSS v3.0

Base Score: 7.5

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:asterisk11, p-cpe:/a:freebsd:freebsd:asterisk13, cpe:/o:freebsd:freebsd

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

Patch Publication Date: 2017/09/19

Vulnerability Publication Date: 2017/09/01

Reference Information

CVE: CVE-2017-14099