#VU8063 Session hijacking in Certified Asterisk and Asterisk Open Source - CVE-2017-14099

Vulnerability identifier: #VU8063

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-14099

CWE-ID: CWE-384

Exploitation vector: Network

Exploit availability: No

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

Vendor: Digium (Linux Support Services)

Description
The vulnerability allows a remote attacker to hijack the target user's media session.

The weakness exists due to a flaw in the strict RTP support feature. A remote attacker can send specially crafted RTP traffic to provide and receive media from the session.

Mitigation
The vulnerability is addressed in the following versions:
Asterisk Open Source - 11.25.2, 13.17.1, 14.6.1.
Certified Asterisk - 11.6-cert17, 13.13-cert5.

Vulnerable software versions

Certified Asterisk: 11.6.0 - 13.13

Asterisk Open Source: 11.0.0 - 11.21.0, 13.0.0 - 13.15.1, 14.0 - 14.4.1

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External links
https://downloads.asterisk.org/pub/security/AST-2017-005.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.