Vulnerability identifier: #VU13261

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

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 authenticated attacker to cause DoS condition on the target system.

The vulnerability exists due to an error when processing malicious input. A remote attacker can send specially crafted data via TCP/TLS or abruptly disconnect to trigger an iostream read error and cause the target service to enter an infinite loop and become unusable.

Mitigation
Update to version 15.4.1.

Vulnerable software versions

Asterisk Open Source: 15.0.0 - 15.2.2

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External links
http://downloads.asterisk.org/pub/security/AST-2018-007.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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