CVSS: 7.5EPSS: 5%CPEs: 21EXPL: 1CVE-2023-50387 – bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator
https://notcve.org/view.php?id=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 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 atacantes remotos provocar una denegación de servicio (consumo de CPU) a través de una o más respuestas DNSSEC cuando hay una zona con muchos registros DNSKEY y RRSIG, también conocido como "KeyTrap". " asunto. La especificación del protocolo implica que un algoritmo debe evaluar todas las combinaciones de registros DNSKEY y RRSIG. 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. • https://github.com/knqyf263/CVE-2023-50387 http://www.openwall.com/lists/oss-security/2024/02/16/2 http://www.openwall.com/lists/oss-security/2024/02/16/3 https://access.redhat.com/security/cve/CVE-2023-50387 https://bugzilla.suse.com/show_bug.cgi?id=1219823 https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 https://kb.isc.org/docs/cve-2023-50387 https://lists&# • CWE-400: Uncontrolled Resource Consumption CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2022-3204 – NRDelegation Attack
https://notcve.org/view.php?id=CVE-2022-3204
A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a considerable number of non responsive nameservers. The attack starts by querying a resolver for a record that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of time/resources resolving records under a malicious delegation point where a considerable number of unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that continually look in the cache for resolved NS records in that delegation. • https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35QGS5FBQTG3DBSK7QV67PA64P24ABHY https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3G2HS6CYPSIGAKO6QLEZPG3RD6AMPB7B https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4EU6DMJXQFMAIE6SLAH4H5RNRU6VQL https://security.gentoo.org/glsa/202212-02 https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-3204 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 6.5EPSS: 0%CPEs: 3EXPL: 0CVE-2022-30699 – Novel "ghost domain names" attack by updating almost expired delegation information
https://notcve.org/view.php?id=CVE-2022-30699
NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. • https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L3ZFWZZFPBIL654BG75RWXUMPFQJ5EC https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D35CX4SCZVNKZTWJXPDFTHWZHINMGEZD https://security.gentoo.org/glsa/202212-02 https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt https://access.redhat.com/security/cve/CVE-2022-30699 https://bugzilla.redhat.com • CWE-613: Insufficient Session Expiration •
CVSS: 6.5EPSS: 0%CPEs: 3EXPL: 0CVE-2022-30698 – Novel "ghost domain names" attack by introducing subdomain delegations
https://notcve.org/view.php?id=CVE-2022-30698
NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation information by querying Unbound for a second level subdomain which the rogue nameserver provides new delegation information. • https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L3ZFWZZFPBIL654BG75RWXUMPFQJ5EC https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D35CX4SCZVNKZTWJXPDFTHWZHINMGEZD https://security.gentoo.org/glsa/202212-02 https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt https://access.redhat.com/security/cve/CVE-2022-30698 https://bugzilla.redhat.com • CWE-613: Insufficient Session Expiration •
CVSS: 5.9EPSS: 0%CPEs: 2EXPL: 0CVE-2019-25031
https://notcve.org/view.php?id=CVE-2019-25031
Unbound before 1.9.5 allows configuration injection in create_unbound_ad_servers.sh upon a successful man-in-the-middle attack against a cleartext HTTP session. NOTE: The vendor does not consider this a vulnerability of the Unbound software. create_unbound_ad_servers.sh is a contributed script from the community that facilitates automatic configuration creation. It is not part of the Unbound installation ** EN DISPUTA ** Unbound versiones anteriores a 1.9.5, permite la inyección de configuración en el archivo create_unbound_ad_servers.sh tras un ataque de tipo man-in-the-middle con éxito contra una sesión HTTP de texto sin cifrar. NOTA: El proveedor no considera que esto sea una vulnerabilidad del software de Unbound. create_unbound_ad_servers.sh es un script contribuido por la comunidad que facilita la creación automática de la configuración. No forma parte de la instalación de Unbound • https://lists.debian.org/debian-lts-announce/2021/05/msg00007.html https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results https://security.netapp.com/advisory/ntap-20210507-0007 • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') •