Test ID:	1.3.6.1.4.1.25623.1.0.126312
Category:	Denial of Service
Title:	ISC BIND DoS Vulnerability (CVE-2022-3094) - Linux
Summary:	ISC BIND is prone to a denial of service (DoS) vulnerability.
Description:	Summary: ISC BIND is prone to a denial of service (DoS) vulnerability. Vulnerability Insight: Sending a flood of dynamic DNS updates may cause named to allocate large amounts of memory. This, in turn, may cause named to exit due to a lack of free memory. Memory is allocated prior to the checking of access permissions (ACLs) and is retained during the processing of a dynamic update from a client whose access credentials are accepted. Memory allocated to clients that are not permitted to send updates is released immediately upon rejection. The scope of this vulnerability is limited therefore to trusted clients who are permitted to make dynamic zone changes. If a dynamic update is REFUSED, memory will be released again very quickly. Therefore it is only likely to be possible to degrade or stop named by sending a flood of unaccepted dynamic updates comparable in magnitude to a query flood intended to achieve the same detrimental outcome. Vulnerability Impact: By flooding the target server with UPDATE requests, the attacker can exhaust all available memory on that server. Affected Software/OS: ISC BIND versions 9.16.0 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8 and 19.16.8-S1 through 19.16.36-S1. Solution: Update to version 9.16.37, 9.18.11, 9.19.9, 9.16.37-S1 or later. CVSS Score: 7.8 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2022-3094 CVE-2022-3094 https://kb.isc.org/docs/cve-2022-3094
Copyright	Copyright (C) 2023 Greenbone Networks GmbH

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