CVSS: 7.8EPSS: 29%CPEs: 21EXPL: 3CVE-2023-50387 – bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator
https://notcve.org/view.php?id=CVE-2023-50387
13 Feb 2024 — 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 records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records. Ciertos aspectos DNSSEC del protocolo DNS (en RFC 4035 y RFC relacionados) permiten a ataca... • https://github.com/knqyf263/CVE-2023-50387 • CWE-400: Uncontrolled Resource Consumption CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 7.8EPSS: 0%CPEs: 38EXPL: 0CVE-2023-3341 – A stack exhaustion flaw in control channel code may cause named to terminate unexpectedly
https://notcve.org/view.php?id=CVE-2023-3341
20 Sep 2023 — The code that processes control channel messages sent to `named` calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size; depending on the environment, this may cause the packet-parsing code to run out of available stack memory, causing `named` to terminate unexpectedly. Since each incoming control channel message is fully parsed before its contents are authenticated, exploiting this flaw does not require the attacker to hold a valid RND... • http://www.openwall.com/lists/oss-security/2023/09/20/2 • CWE-20: Improper Input Validation CWE-787: Out-of-bounds Write •
CVSS: 7.8EPSS: 1%CPEs: 21EXPL: 0CVE-2023-2911 – Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0
https://notcve.org/view.php?id=CVE-2023-2911
21 Jun 2023 — If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow. This issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1. If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `st... • http://www.openwall.com/lists/oss-security/2023/06/21/6 • CWE-787: Out-of-bounds Write •
CVSS: 7.8EPSS: 0%CPEs: 13EXPL: 0CVE-2023-2829 – Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is enabled
https://notcve.org/view.php?id=CVE-2023-2829
21 Jun 2023 — A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record. This issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1. A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec... • https://kb.isc.org/docs/cve-2023-2829 •
CVSS: 7.8EPSS: 11%CPEs: 21EXPL: 0CVE-2023-2828 – named's configured cache size limit can be significantly exceeded
https://notcve.org/view.php?id=CVE-2023-2828
21 Jun 2023 — Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the `max-cache-size` statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used ... • http://www.openwall.com/lists/oss-security/2023/06/21/6 • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 7.8EPSS: 0%CPEs: 9EXPL: 0CVE-2022-3924 – named configured to answer from stale cache may terminate unexpectedly at recursive-clients soft quota
https://notcve.org/view.php?id=CVE-2022-3924
25 Jan 2023 — 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 clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `... • https://kb.isc.org/docs/cve-2022-3924 • CWE-20: Improper Input Validation CWE-617: Reachable Assertion •
CVSS: 7.8EPSS: 1%CPEs: 9EXPL: 0CVE-2022-3736 – named configured to answer from stale cache may terminate unexpectedly while processing RRSIG queries
https://notcve.org/view.php?id=CVE-2022-3736
25 Jan 2023 — BIND 9 resolver can crash when stale cache and stale answers are enabled, option `stale-answer-client-timeout` is set to a positive integer, and the resolver receives an RRSIG query. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1. El solucionador BIND 9 puede fallar cuando el caché obsoleto y las respuestas obsoletas están habilitados, la opción `stale-answer-client-timeout` está configurada en un entero positivo y... • https://kb.isc.org/docs/cve-2022-3736 • CWE-20: Improper Input Validation •
CVSS: 7.8EPSS: 1%CPEs: 10EXPL: 0CVE-2022-3094 – An UPDATE message flood may cause named to exhaust all available memory
https://notcve.org/view.php?id=CVE-2022-3094
25 Jan 2023 — Sending a flood of dynamic DNS updates may cause `named` to allocate large amounts of memory. This, in turn, may cause `named` to exit due to a lack of free memory. We are not aware of any cases where this has been exploited. Memory is allocated prior to the checking of access permissions (ACLs) and is retained during the processing of a dynamic update from a client whose access credentials are accepted. Memory allocated to clients that are not permitted to send updates is released immediately upon rejectio... • https://kb.isc.org/docs/cve-2022-3094 • CWE-20: Improper Input Validation CWE-400: Uncontrolled Resource Consumption CWE-416: Use After Free •
CVSS: 5.3EPSS: 0%CPEs: 35EXPL: 0CVE-2022-2795 – Processing large delegations may severely degrade resolver performance
https://notcve.org/view.php?id=CVE-2022-2795
21 Sep 2022 — By flooding the target resolver with queries exploiting this flaw an attacker can significantly impair the resolver's performance, effectively denying legitimate clients access to the DNS resolution service. Al inundar el resolvedor de destino con consultas que explotan este fallo, un atacante puede perjudicar significativamente el rendimiento del resolvedor, negando efectivamente a los clientes legítimos el acceso al servicio de resolución DNS A flaw was found in bind. When flooding the target resolver wit... • http://www.openwall.com/lists/oss-security/2022/09/21/3 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 7.8EPSS: 0%CPEs: 9EXPL: 0CVE-2022-3080 – BIND 9 resolvers configured to answer from stale cache with zero stale-answer-client-timeout may terminate unexpectedly
https://notcve.org/view.php?id=CVE-2022-3080
21 Sep 2022 — By sending specific queries to the resolver, an attacker can cause named to crash. Mediante el envío de consultas específicas al resolver, un atacante puede causar la caída de named A flaw was found in the Bind package, where the resolver can crash when stale cache and stale answers are enabled, option stale-answer-client-timeout is set to 0 and there is a stale CNAME in the cache for an incoming query. By sending specific queries to the resolver, an attacker can cause named to crash. Yehuda Afek, Anat Brem... • http://www.openwall.com/lists/oss-security/2022/09/21/3 • CWE-20: Improper Input Validation CWE-613: Insufficient Session Expiration •