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

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• 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