Vulnerability identifier: #VU10714

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2018-7287

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Asterisk Open Source
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Digium (Linux Support Services)

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the res_http_websocket.c code due to insufficient length checks on WebSocket frames. A remote attacker can send send WebSocket frames with a zero-length payload, trigger a busy loop condition until the underlying socket on the system is closed and cause the service to crash.

Mitigation
Update to version 15.2.2.

Vulnerable software versions

Asterisk Open Source: 15.0.0 - 15.2.1

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CPE

• cpe:2.3:a:digium_linux_support_services:asterisk:15.1.2:*:*:*:*:*:*:*

External links
http://downloads.asterisk.org/pub/security/AST-2018-006.html

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?