bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator

Processing specially crafted responses coming from DNSSEC-signed zones can lead to uncontrolled CPU usage, leading to a Denial of Service in the DNSSEC-validating resolver side. This vulnerability applies only for systems where DNSSEC validation is enabled...

bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator

Processing specially crafted responses coming from DNSSEC-signed zones can lead to uncontrolled CPU usage, leading to a Denial of Service in the DNSSEC-validating resolver side. This vulnerability applies only for systems where DNSSEC validation is enabled...

bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources

A flaw was found in bind9. By flooding a DNSSEC resolver with responses coming from a DNSEC-signed zone using NSEC3, an attacker can lead the targeted resolver to a CPU exhaustion, further leading to a Denial of Service on the targeted host. This vulnerability applies only for systems where DNSSE...

bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator

Processing specially crafted responses coming from DNSSEC-signed zones can lead to uncontrolled CPU usage, leading to a Denial of Service in the DNSSEC-validating resolver side. This vulnerability applies only for systems where DNSSEC validation is enabled...

[SECURITY] Fedora 38 Update: bind9-next-9.19.21-1.fc38

BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. BIND includes a DNS server named, which resolves host names to IP addresses; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server ...

The vulnerability of the DNSSEC component of the DNS server BIND implementation allows a attacker to cause service failures.

The vulnerability of DNSSEC implementation in DNS server BIND is related to algorithmic complexity and unlimited resource distribution during the creation of a DNS zone. Exploiting this vulnerability can allow a malicious actor to cause service failures...

Enabling both DNS64 and serve-stale may cause an assertion failure during recursive resolution

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[SECURITY] Fedora 39 Update: bind-9.18.24-1.fc39

BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. BIND includes a DNS server named, which resolves host names to IP addresses; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server ...

The vulnerability of the DNSSEC component of the DNS server BIND implementation allows a attacker to cause service failures.

The vulnerability of DNSSEC implementation in DNS server BIND is related to algorithmic complexity and unlimited resource distribution during the creation of a DNS zone. Exploiting this vulnerability can allow a malicious actor to cause service failures...

SUSE CVE-2023-50868

The Closest Encloser Proof aspect of the DNS protocol in RFC 5155 when RFC 9276 guidance is skipped allows remote attackers to cause a denial of service CPU consumption for SHA-1 computations via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification...

DEBIAN-CVE-2023-50387

Certain DNSSEC aspects of the DNS protocol in RFC 4033, 4034, 4035, 6840, and related RFCs allow remote attackers to cause a denial of service CPU consumption via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG...

AZL-34350 CVE-2023-50387 affecting package bind for versions less than 9.16.48-1

Certain DNSSEC aspects of the DNS protocol in RFC 4033, 4034, 4035, 6840, and related RFCs allow remote attackers to cause a denial of service CPU consumption via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG...

ALPINE-CVE-2023-50868

The Closest Encloser Proof aspect of the DNS protocol in RFC 5155 when RFC 9276 guidance is skipped allows remote attackers to cause a denial of service CPU consumption for SHA-1 computations via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification...

CVE-2024-21342

Windows DNS Client Denial of Service Vulnerability...

USN-6633-1 bind9 vulnerabilities

Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled parsing large DNS messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. CVE-2023-4408 Elias Heftrig, Haya Schulmann,...

ALPINE-CVE-2023-4408

The DNS message parsing code in named includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected named instance by exploiting this flaw. This issue affects bot...

AZL-34353 CVE-2023-4408 affecting package bind for versions less than 9.16.48-1

The DNS message parsing code in named includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected named instance by exploiting this flaw. This issue affects bot...

DEBIAN-CVE-2023-4408

The DNS message parsing code in named includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected named instance by exploiting this flaw. This issue affects bot...

DEBIAN-CVE-2023-5517

A flaw in query-handling code can cause named to exit prematurely with an assertion failure when: - nxdomain-redirect ; is configured, and - the resolver receives a PTR query for an RFC 1918 address that would normally result in an authoritative NXDOMAIN response. This issue affects BIND 9 versio...

AZL-34564 CVE-2023-5679 affecting package bind for versions less than 9.19.21-1

A bad interaction between DNS64 and serve-stale may cause named to crash with an assertion failure during recursive resolution, when both of these features are enabled. This issue affects BIND 9 versions 9.16.12 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.16.12-S1 through...