The remote Ubuntu 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5827-1 advisory.

  - 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)

  - 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)

  - 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)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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Ubuntu 20.04 LTS / 22.04 LTS : Bind vulnerabilities (USN-5827-1)

high Nessus Plugin ID 170632

Version 1.2