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ISC BIND: Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0 (CVE-2023-2911)

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ISC BIND: Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0 (CVE-2023-2911)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
06/21/2023
Created
08/02/2023
Added
08/01/2023
Modified
01/28/2025

Description

If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow. This issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.

Solution(s)

  • upgrade-isc-bind-latest

References

  • https://attackerkb.com/topics/cve-2023-2911
  • CVE - 2023-2911
  • https://kb.isc.org/v1/docs/cve-2023-2911
  • 查看数 699
  • 已创建
  • 最后回复

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