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

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....

CVE-2025-40777

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...

ALPINE-CVE-2025-40776

A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1...

CVE-2025-40776

A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1...

CVE-2025-40776

A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1...

CVE-2025-40776 Birthday Attack against Resolvers supporting ECS

A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1...

CVE-2025-40776

CVE-2025-40776 affects ISC BIND named caching resolvers that are configured to send EDNS Client Subnet (ECS) options. The vulnerability is a potential cache-poisoning issue in the resolver when ECS is present. Affected BIND 9 versions are 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S...

CVE-2025-40776

A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1...

CVE-2025-40776 Birthday Attack against Resolvers supporting ECS

A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1...

CVE-2025-40776

A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1...

ISC BIND 9 安全漏洞

ISC BIND 9 is a Domain Name System software from the ISC organization. A security vulnerability exists in ISC BIND 9 that stems from vulnerability to cache poisoning attacks. The following versions are affected: versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1...

PT-2025-29873

Name of the Vulnerable Software and Affected Versions BIND versions 9.20.0 through 9.20.10 BIND versions 9.21.0 through 9.21.9 BIND versions 9.20.9-S1 through 9.20.10-S1 Description If a named caching resolver is configured with serve-stale-enable set to yes, and with stale-answer-client-timeout...

ISC BIND 9 安全漏洞

ISC BIND 9 is a Domain Name System software from the ISC organization. A security vulnerability exists in ISC BIND 9 that stems from an assertion failure that could result in service suspension. The following versions are affected: versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and...

ROS-20250716-01

DNS BIND server vulnerability is related to asymmetric resource consumption. Exploiting the vulnerability Allows a remote attacker to cause a denial of service...

UBUNTU-CVE-2025-40777

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...

Slackware Linux 15.0 / current bind Vulnerability (SSA:2025-197-01)

The version of bind installed on the remote host is prior to 9.18.38 / 9.20.11. It is, therefore, affected by a vulnerability as referenced in the SSA:2025-197-01 advisory. New bind packages are available for Slackware 15.0 and -current to fix a security issue. Tenable has extracted the preceding...

PT-2025-29825 · Isc · Bind

Name of the Vulnerable Software and Affected Versions: BIND 9 versions 9.11.3-S1 through 9.16.50-S1 BIND 9 versions 9.18.11-S1 through 9.18.37-S1 BIND 9 versions 9.20.9-S1 through 9.20.10-S1 Description: A named caching resolver configured to send ECS EDNS Client Subnet options may be vulnerable ...

Rocky Linux Updates in ASCG 3.3.0

Multiple Rocky Linux updates applied to Brocade ASCG 3.3.0 RockyLinux 8:bzip2 RLSA-2025:0733 bzip2: bzip2: Data integrity error when decompressing with data integrity tests fail. CVE-2019-12900 RockyLinux 8:pam RLSA-2024:10379 pam: libpam: Libpam vulnerable to read hashed password CVE-2024-10041...