Vulnerability identifier: #VU9523

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-400

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 vulnerability exists due to an error when handling malicious input. A remote attacker can send a flood of specially crafted data to trigger a flaw in the chan_skinny (SCCP protocol) channel driver, consume excessive virtual memory on the target system and cause the service to stop processing requests. .

Successful exploitation of the vulnerability results in denial of service.

Mitigation
The vulnerability is addressed in the following versions: 13.18.3, 14.7.3, 15.1.3.

Vulnerable software versions

Asterisk Open Source: 13.0.0 - 13.18.0, 11.13.0, 14.0 - 14.7.0, 15.0.0 - 15.1.0

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External links
http://downloads.asterisk.org/pub/security/AST-2017-013.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.