suse-su-2023:0341-1
Vulnerability from csaf_suse
Published
2023-02-10 09:04
Modified
2023-02-10 09:04
Summary
Security update for bind

Notes

Title of the patch
Security update for bind
Description of the patch
This update for bind fixes the following issues: - Updated to version 9.16.37 (jsc#SLE-24600): - CVE-2022-3094: Fixed an issue where a message flood could exhaust all available memory (bsc#1207471). - CVE-2022-3736: Fixed a potential crash upon receiving an RRSIG in configurations with stale cache and stale answers enabled and stale-answer-client-timeout set to a positive value (bsc#1207473). - CVE-2022-3924: Fixed a potential crash upon reaching the recursive-clients soft quota in configurations with stale answers enabled and stale-answer-client-timeout set to a positive value (bsc#1207475).
Patchnames
SUSE-2023-341,SUSE-SLE-Module-Basesystem-15-SP4-2023-341,SUSE-SLE-Module-Server-Applications-15-SP4-2023-341,openSUSE-SLE-15.4-2023-341
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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          "text": "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.\n\nMemory 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.\n\nIf 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.\n\nBIND 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\u0027t intend to address this for BIND versions prior to BIND 9.16.\nThis 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.",
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            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "date": "2023-02-10T09:04:44Z",
          "details": "important"
        }
      ],
      "title": "CVE-2022-3924"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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