CVE-2022-3736

named configured to answer from stale cache may terminate unexpectedly while processing RRSIG queries

Published Jan 25, 2023 CVSS 3.1 · 7.5 High EPSS 48.4% KEV · Not listed
Description
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.

Analysis

No analysis available yet

Remediation

Vendor Solution

Upgrade to the patched release most closely related to your current version of BIND 9: 9.16.37, 9.18.11, 9.19.9, or 9.16.37-S1.


Vendor Workaround

Setting `stale-answer-client-timeout` to `0` or to `off/disabled` will prevent BIND from crashing due to this issue.

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-5329-1 bind9 security update
EUVD EUVD EUVD-2022-43092 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.
Ubuntu USN Ubuntu USN USN-5827-1 Bind vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
isc
Published
Updated
Apr 1, 2025, 2:10 PM
Reserved
Oct 28, 2022, 7:04 AM
Status
Modified
Published
Jan 26, 2023, 9:15 PM
Modified
Jun 17, 2026, 5:00 AM
Severity
Moderate
Public date
Jan 25, 2023, 12:00 AM