CVE Vulnerability

CVE-2018-7285

A NULL pointer access issue was discovered in Asterisk 15.x through 15.2.1. The RTP support in Asterisk maintains its own registry of dynamic codecs and desired payload numbers. While an SDP negotiation may result in a codec using a different payload number, these desired ones are still stored internally. When an RTP packet was received, this registry would be consulted if the payload number was not found in the negotiated SDP. This registry was incorrectly consulted for all packets, even those which are dynamic. If the payload number resulted in a codec of a different type than the RTP stream (for example, the payload number resulted in a video codec but the stream carried audio), a crash could occur if no stream of that type had been negotiated. This was due to the code incorrectly assuming that a stream of that type would always exist.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
http://downloads.asterisk.org/pub/security/AST-2018-001.html Patch Vendor Advisory
http://www.securitytracker.com/id/1040415 Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/103149 Third Party Advisory VDB Entry
Configurations

Configuration 1

cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
Information

Published : 2018-02-22 12:29

Updated : 2018-03-21 12:56

NVD link : CVE-2018-7285

Mitre link : CVE-2018-7285

Products Affected
No products.
CWE
CWE-476