CVE-2021-25219

Description

In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.

References

https://kb.isc.org/v1/docs/cve-2021-25219

https://www.debian.org/security/2021/dsa-4994

https://lists.fedoraproject.org/archives/list/[email protected]/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4/

https://lists.fedoraproject.org/archives/list/[email protected]/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX/

https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW/

https://security.netapp.com/advisory/ntap-20211118-0002/

https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

https://www.oracle.com/security-alerts/cpuapr2022.html

https://security.gentoo.org/glsa/202210-25

Details

Risk Information

CVSS v2

CVSS v3