- Description
- If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer-client-timeout` set to `0` (the only allowable value other than `disabled`), and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or authoritative records, the daemon will abort with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and 9.20.9-S1 through 9.20.10-S1.
- Source
- security-officer@isc.org
- NVD status
- Awaiting Analysis
CVSS 3.1
- Type
- Primary
- Base score
- 7.5
- Impact score
- 3.6
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity
- HIGH
- security-officer@isc.org
- CWE-617
- Hype score
- Not currently trending
BIND 9.20.xの脆弱性（DNSサービスの停止）について（CVE-2025-40777） https://t.co/wJKIiPja2J
@vericava
17 Jul 2025
103 Impressions
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【注意喚起】BIND 9.20.xの脆弱性（DNSサービスの停止）について（CVE-2025-40777） - バージョンアップを強く推奨 - https://t.co/kQIUR5ukNJ
@JPRS_official
17 Jul 2025
1971 Impressions
4 Retweets
7 Likes
1 Bookmark
0 Replies
2 Quotes
RHEL6〜10はNot Affected ヨシっ // "CVE-2025-40777 Moderate 5.3" https://t.co/YyMIIOhGpM
@w4yh
17 Jul 2025
4 Impressions
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CVE-2025-40777 If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer-client-timeout` set to `0` (the only allowable value other than `d… https://t.co/9YhKUpQVSa
@CVEnew
16 Jul 2025
237 Impressions
0 Retweets
1 Like
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0 Quotes