#VU20962 Input validation error in Asterisk - CVE-2019-15639

Vulnerability identifier: #VU20962

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-15639

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Asterisk
Server applications / Frameworks for developing and running applications

Vendor: Sangoma Technologies Corporation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the "main/translate.c". A remote attacker can send a specific RTP packet during a call and cause a crash in a specific scenario.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Asterisk: 13.28.0 - 16.5.0

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External links
https://downloads.asterisk.org/pub/security/AST-2019-005.html
https://packetstormsecurity.com/files/154372/Asterisk-Project-Security-Advisory-AST-2019-005.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.