- 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
- Deferred
CVSS 3.1
- Type
- Secondary
- 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
🚨CVE-2025-40776: Cache Poisoning Vulnerability and CVE-2025-40777: Crash Vulnerability FOFA Query: app="ISC-BIND-DNS" Results: 15,918 FOFA: https://t.co/i03uGrqevp CVSS: 8.6 and 7.5 More Info: https://t.co/YCinE08Kj0 https://t.co/GKqAJ8nzw5
@DarkWebInformer
29 Jul 2025
3811 Impressions
4 Retweets
27 Likes
11 Bookmarks
1 Reply
0 Quotes
【メールマガジン（FROM JPRS）】最新号を掲載しました。 通常号 vol.1204「BIND 9.20.xの脆弱性（DNSサービスの停止）について（CVE-2025-40777）、他1件」など https://t.co/dMQElKLHWo
@JPRS_official
22 Jul 2025
156 Impressions
0 Retweets
2 Likes
0 Bookmarks
0 Replies
0 Quotes
به تازگی برای BIND ورژن 9 دو آسیب پذیری خطرناک با کدهای شناسایی CVE-2025-40776 و CVE-2025-40777 منتشر شده است. آسیب پذیری اول از نوع DNS Cache Poisoning و آسیب پذیری دوم از نوع DOS می
@AmirHossein_sec
19 Jul 2025
30 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
CVE-2025-40776 and CVE-2025-40777 # BIND 9 DNS resolver Cache Poisoning & dos flaw exposed >>>: https://t.co/nzWBQ5e9dl
@cyberbivash
19 Jul 2025
5 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
CVE-2025-40776 and CVE-2025-40777 # BIND 9 DNS resolver Cache Poisoning & dos flaw exposed >>>: https://t.co/nzWBQ5eH2T
@cyberbivash
19 Jul 2025
5 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
⚠️⚠️ CVE-2025-40776 and CVE-2025-40777 ISC Warns of Cache Poisoning and Crash Risks in BIND 🎯16k+ Results are found on the https://t.co/pb16tGYaKe nearly year 🔗FOFA Link:https://t.co/8vbFRsWzQh FOFA Query:app="ISC-BIND-DNS" 🔖Refer:https://t.co/rhRHNZCxgN #OSINT #
@fofabot
18 Jul 2025
704 Impressions
1 Retweet
7 Likes
1 Bookmark
0 Replies
0 Quotes
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
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
【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
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
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
0 Bookmarks
0 Replies
0 Quotes