Test ID:	1.3.6.1.4.1.25623.1.1.2.2023.1754
Category:	Huawei EulerOS Local Security Checks
Title:	Huawei EulerOS: Security Advisory for bind (EulerOS-SA-2023-1754)
Summary:	The remote host is missing an update for the Huawei EulerOS 'bind' package(s) announced via the EulerOS-SA-2023-1754 advisory.
Description:	Summary: The remote host is missing an update for the Huawei EulerOS 'bind' package(s) announced via the EulerOS-SA-2023-1754 advisory. 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. We are not aware of any cases where this has been exploited. 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. BIND 9.11 and earlier branches are also affected, but through exhaustion of internal resources rather than memory constraints. This may reduce performance but should not be a significant problem for most servers. Therefore we don't intend to address this for BIND versions prior to BIND 9.16. This issue affects BIND 9 versions 9.16.0 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.8-S1 through 9.16.36-S1.(CVE-2022-3094) BIND 9 resolver can crash when stale cache and stale answers are enabled, option `stale-answer-client-timeout` is set to a positive integer, and the resolver receives an RRSIG query. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.(CVE-2022-3736) This issue can affect BIND 9 resolvers with `stale-answer-enable yes,` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero. If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `recursive-clients` limit and soft quota), then it is possible for a race to occur between providing a stale answer to this older client and sending an early timeout SERVFAIL, which may cause an assertion failure. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.(CVE-2022-3924) Affected Software/OS: 'bind' package(s) on Huawei EulerOS V2.0SP11. Solution: Please install the updated package(s). 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 Common Vulnerability Exposure (CVE) ID: CVE-2022-3736 CVE-2022-3736 https://kb.isc.org/docs/cve-2022-3736 Common Vulnerability Exposure (CVE) ID: CVE-2022-3924 CVE-2022-3924 https://kb.isc.org/docs/cve-2022-3924
Copyright	Copyright (C) 2023 Greenbone AG

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