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

Description

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.

Scores

Weaknesses (CWE)

• CWE-617

European references

• ENISA EUVD · EUVD-2021-12129
• GCVE · GCVE-0-2021-25218

CERT-FR advisories

• CERTFR-2021-AVI-644 — Vulnérabilité dans ISC BIND · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• cpe:2.3:a:isc:bind:9.16.19:*:*:*:-:*:*:*
• cpe:2.3:a:isc:bind:9.17.16:*:*:*:-:*:*:*
• cpe:2.3:a:isc:bind:9.17.16:s1:*:*:supported_preview:*:*:*
• cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Affected products

References

• https://kb.isc.org/v1/docs/cve-2021-25218
• http://www.openwall.com/lists/oss-security/2021/08/18/3
• http://www.openwall.com/lists/oss-security/2021/08/20/2
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZPJCLGSR4BTGFLBLGIE5TEQP2SNJKGVL/
• https://security.netapp.com/advisory/ntap-20210909-0002/

Sources