7.5high
CVE-2021-25218
A too-strict assertion check could be triggered when responses in BIND 9.16.19 and 9.17.16 require UDP fragmentation if RRL is in use
Published 5 y ago · modified 4 mo ago · JSON
CVSS
7.5
v3.1 · CNA
CISA KEV
No
not known exploited
EPSS
3.7%
percentile 90%
Public exploits
0
none known
Summary
In BIND 9.16.19, 9.17.16. Also, version 9.16.19-S1 of BIND Supported Preview Edition When a vulnerable version of named receives a query under the circumstances described above, the named process will terminate due to a failed assertion check. The vulnerability affects only BIND 9 releases 9.16.19, 9.17.16, and release 9.16.19-S1 of the BIND Supported Preview Edition.
Exploit prediction (EPSS)
3.66% probability of exploitation in the next 30 days, higher than 90% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- ISC BIND9
Classification
- Weakness
- CWE-617 Reachable Assertion
References
- kb.isc.org /v1/docs/cve-2021-25218 · x_refsource_CONFIRM, x_transferred
- openwall.com /lists/oss-security/2021/08/18/3 · mailing-list, x_refsource_MLIST, x_transferred
- openwall.com /lists/oss-security/2021/08/20/2 · mailing-list, x_refsource_MLIST, x_transferred
- lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/ZPJCLGSR4BTGFLBLGIE5TEQP · vendor-advisory, x_refsource_FEDORA, x_transferred
- security.netapp.com /advisory/ntap-20210909-0002/ · x_refsource_CONFIRM, x_transferred
Sources
- CVE List: CVE-2021-25218
- NVD: CVE-2021-25218
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