CVE-2025-40777 A possible assertion failure when 'stale-answer-client-timeout' is set to '0'

If a named caching resolver is configured with serve-stale-enable yes, and with stale-answer-client-timeout set to 0 the only allowable value other than disabled, and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or...

CVE-2025-40777

Summary: CVE-2025-40777 affects ISC BIND 9 where a named caching resolver configured with serve-stale-enable=yes and stale-answer-client-timeout=0 can abort due to an assertion failure while resolving a CNAME chain. Affected versions include BIND 9.20.0–9.20.10, 9.21.0–9.21.9, and 9.20.9-S1–9.20....

Huawei EulerOS: Security Advisory for bind (EulerOS-SA-2023-2854)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Ubuntu 20.04 LTS / 22.04 LTS / 23.04 : Bind vulnerabilities (USN-6183-1)

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6183-1 advisory. Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled the cache size limit. A...

CVE-2022-3924

This issue can affect BIND 9 resolvers with stale-answer-enable yes; that also make use of the option stale-answer-client-timeout, configured with a value greater than zero. If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clien...

Design/Logic Flaw

This issue can affect BIND 9 resolvers with stale-answer-enable yes; that also make use of the option stale-answer-client-timeout, configured with a value greater than zero. If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clien...

CVE-2022-3924

CVE-2022-3924 is a vulnerability in ISC BIND where stale-answer-client-timeout (enabled with a positive value) can cause a race between returning a stale answer and an early SERVFAIL, potentially triggering an assertion failure and DoS. Affected are BIND 9.16.12–9.16.36, 9.18.0–9.18.10, 9.19.0–9....

ROS-20220929-01

BIND DNS server vulnerability is related to boundary conditions when reusing HTTP connection when requesting statistics from a statistics channel. Exploitation of the vulnerability could allow an attacker, acting remotely, using a managed DNS server to cause a read error outside the boundary...