CVE-2021-25219Lame cache can be abused to severely degrade resolver performance

Beschreibung

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.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• https://kb.isc.org/v1/docs/cve-2021-25219
• DSA-4994 vendor-advisory
• [debian-lts-announce] 20211102 [SECURITY] [DLA 2807-1] bind9 security update mailing-list
• FEDORA-2021-58e7b873b7 vendor-advisory
• FEDORA-2021-39b33260b8 vendor-advisory
• FEDORA-2021-eb8dab50ba vendor-advisory
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
• https://security.netapp.com/advisory/ntap-20211118-0002/
• GLSA-202210-25 vendor-advisory