The remote Fedora 38 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2023-239f057b33 advisory.

    # UnrealIRCd 6.1.3

    The main focus of this release is adding countermeasures against large scale spam/drones. Upstream does     this by offering a central API which can be used for accessing Central Blocklist, Central Spamreport and     Central Spamfilter.

    ## Enhancements
      * Central anti-spam services:
        * The services from below require a central-api key, which you can [request     here](https://www.unrealircd.org/central-api/).
        * [Central Blocklist](https://www.unrealircd.org/docs/Central_Blocklist) is an attempt to detect and     block spammers. It works similar to DNS Blacklists but the central blocklist receives many more details     about the user that is trying to connect and therefore can make a better decision on whether a user is     likely a spammer.
        * [Central Spamreport](https://www.unrealircd.org/docs/Central_spamreport) allows you to send spam     reports (user details, last sent lines) via the `SPAMREPORT` command. This information may then be used to     improve [Central Blocklist](https://www.unrealircd.org/docs/Central_Blocklist) and/or [Central     Spamfilter](https://www.unrealircd.org/docs/Central_Spamfilter).
        * The [Central Spamfilter](https://www.unrealircd.org/docs/Central_Spamfilter), which provides     `spamfilter { }` blocks that are centrally managed, is now fetched from a different URL if you have an     Central API key set. This way, upstream can later provide `spamfilter { }` blocks that build on central     blocklist scoring functionality, and also so upstream doesn't have to reveal all the central spamfilter     blocks to the world.
      * New option `auto` for [set::hide-ban-reason](https://www.unrealircd.org/docs/Set_block#set::hide-ban-     reason), which is now the default. This will hide the \*LINE reason to other users if the \*LINE reason     contains the IP of the user, for example when it contains a DroneBL URL which has `lookup?ip=XXX`. This to     protect the privacy of the user. Other possible settings are `no` (never hide, the previous default) and     `yes` to always hide the \*LINE reason. In all cases the user affected by the server ban can still see the     reason and IRCOps too.
      * Make [Deny channel](https://www.unrealircd.org/docs/Deny_channel_block) support escaped sequences like     `channel #xyz\*;` so you can match a literal `*` or `?` via `\*` and `\?`.
      * New option [listen::options::websocket::allow-     origin](https://www.unrealircd.org/docs/Listen_block#options_block_(optional)): this allows to restrict     websocket connections to a list of websites (the sites hosting the HTML/JS page that makes the websocket     connection). It doesn't *securely* restrict it though, non-browsers will bypass this restriction, but it     can still be useful to restrict regular webchat users.
      * The [Proxy block](https://www.unrealircd.org/docs/Proxy_block) already had support for reverse     proxying with the `Forwarded` header. Now it also properly supports `X-Forwarded-For`. If you previously     used a proxy block with type `web`, then you now need to choose one of the new types explicitly. Note that     using a reverse proxy for IRC traffic is rare (see the proxy block docs for details), but upstream offers     the option.

    ## Changes
      * Reserve more file descriptors for internal use. For example, when there are 10,000 fd's are available     upstream now reserves 250, and when 2048 are available upstream reserves 32. This so upstream has more fds     available to handle things like log files, do HTTPS callbacks to blacklists, etc.
      * Make `$client.details` in logs follow the ident rules for users in the handshake too, so use the `~`     prefix if ident lookups are enabled and identd fails etc.
      * More validation for operclass names (`a-zA-Z0-9_-`)
      * Hits for central-blocklist are now broadcasted globally instead of staying on the same server.

    ## Fixes
      * When using a trusted reverse proxy with the [Proxy     block](https://www.unrealircd.org/docs/Proxy_block), under some circumstances it was possible for end-     users to spoof IPs.
      * Crash issue when a module is reloaded (not unloaded) and that module no longer provides a particular     moddata object, e.g. because it was renamed or no longer needed. This is rare, but did happen for one     third party module recently.
      * Fix memory leak when unloading a module for good and that module provided ModData objects for unknown     users (users still in the handshake).
      * Don't ask to generate TLS certificate if one already exists (issue introduced in 6.1.2).

    ## Developers and protocol
      * New hooks: `HOOKTYPE_WATCH_ADD`, `HOOKTYPE_WATCH_DEL`, `HOOKTYPE_MONITOR_NOTIFICATION`.
      * The hook `HOOKTYPE_IS_HANDSHAKE_FINISHED` is now properly called at all places.
      * A new [URL API](https://www.unrealircd.org/docs/Dev:URL_API) to easily fetch URLs from modules.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

Detections

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Fedora 38 : unrealircd (2023-239f057b33)

high Nessus Plugin ID 187047

Version 1.1

Version 1.0

Version 1.1 Nov 15, 2024, 3:52 PM CVSS metrics ("CVSSv2 score" set to 0.0) CVSS metrics ("CVSSv3 score" set to 0.0) CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") CVSSv3 severity (based on None, severity decreased from "High" to "Low") Plugin metadata Plugin Feed: 202411151552
Version 1.0 Dec 18, 2023, 4:29 AM New Plugin Feed: 202312180429