// For flags

CVE-2023-2911

Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-05-26 CVE Reserved
  • 2023-06-21 CVE Published
  • 2024-08-02 CVE Updated
  • 2024-09-25 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Netapp
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H700s Firmware
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--
Affected
in Netapp
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H700s
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--
Safe
Netapp
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H300s Firmware
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--
Affected
in Netapp
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H300s
Search vendor "Netapp" for product "H300s"
--
Safe
Netapp
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H410c Firmware
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--
Affected
in Netapp
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H410c
Search vendor "Netapp" for product "H410c"
--
Safe
Netapp
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H410s Firmware
Search vendor "Netapp" for product "H410s Firmware"
--
Affected
in Netapp
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H410s
Search vendor "Netapp" for product "H410s"
--
Safe
Netapp
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H500s Firmware
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--
Affected
in Netapp
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H500s
Search vendor "Netapp" for product "H500s"
--
Safe
Isc
Search vendor "Isc"
Bind
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>= 9.16.33 <= 9.16.41
Search vendor "Isc" for product "Bind" and version " >= 9.16.33 <= 9.16.41"
-
Affected
Isc
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Bind
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>= 9.16.33 <= 9.16.41
Search vendor "Isc" for product "Bind" and version " >= 9.16.33 <= 9.16.41"
supported_preview
Affected
Isc
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Bind
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>= 9.18.7 <= 9.18.15
Search vendor "Isc" for product "Bind" and version " >= 9.18.7 <= 9.18.15"
-
Affected
Isc
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Bind
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>= 9.18.11 <= 9.18.15
Search vendor "Isc" for product "Bind" and version " >= 9.18.11 <= 9.18.15"
supported_preview
Affected
Debian
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Debian Linux
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11.0
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-
Affected
Debian
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Debian Linux
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12.0
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-
Affected
Fedoraproject
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Fedora
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37
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-
Affected
Fedoraproject
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Fedora
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38
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-
Affected
Debian
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Debian Linux
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11.0
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-
Affected
Debian
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Debian Linux
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12.0
Search vendor "Debian" for product "Debian Linux" and version "12.0"
-
Affected
Netapp
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Active Iq Unified Manager
Search vendor "Netapp" for product "Active Iq Unified Manager"
-vmware_vsphere
Affected