Test ID:	1.3.6.1.4.1.25623.1.0.145417
Category:	Denial of Service
Title:	Asterisk DoS Vulnerability (AST-2021-002)
Summary:	Asterisk is prone to a denial of service vulnerability when; negotiating T.38.
Description:	Summary: Asterisk is prone to a denial of service vulnerability when negotiating T.38. Vulnerability Insight: When re-negotiating for T.38 if the initial remote response was delayed just enough Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream then Asterisk would crash. Affected Software/OS: Asterisk Open Source versions 16.15.0 through 16.16.0, 17.9.0 through 17.9.1, 18.1.0 through 18.2.0 and Certified Asterisk versions 16.8-cert4 and 16.8-cert5. Solution: Update to version 16.16.1, 17.9.2, 18.2.1, 16.8-cert6 or later. CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-26717 http://seclists.org/fulldisclosure/2021/Feb/58 http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html https://downloads.asterisk.org/pub/security/
Copyright	Copyright (C) 2021 Greenbone AG

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