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: 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
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 with special queries, an attacker can significantly impair the resolver's performance, effectively denying legitimate clients access to the DNS resolution service. • http://www.openwall.com/lists/oss-security/2022/09/21/3 https://kb.isc.org/docs/cve-2022-2795 https://lists.debian.org/debian-lts-announce/2022/10/msg00007.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CV4GQWBPF7Y52J2FA24U6UMHQAOXZEF7 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MRHB6J4Z7BKH4HPEKG5D35QGRD6ANNMT https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZJQNUASODNVAWZV6STKG5S • CWE-400: Uncontrolled Resource Consumption •
CVSS: 5.3EPSS: 0%CPEs: 51EXPL: 0CVE-2021-25219 – Lame cache can be abused to severely degrade resolver performance
https://notcve.org/view.php?id=CVE-2021-25219
In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing. En BIND versiones 9.3.0 posteriores a 9.11.35, versiones 9.12.0 posteriores a 9.16.21, y en versiones 9.9.3-S1 posteriores a 9.11.35-S1 y versiones 9.16.8-S1 posteriores a 9.16.21-S1 de BIND Supported Preview Edition, así como en las versiones 9.17.0 -> 9.17.18 de la rama de desarrollo de BIND 9.17, una explotación de servidores autoritativos rotos usando un fallo en el procesamiento de respuestas puede causar una degradación en el rendimiento del resolver BIND. La forma en que está diseñada actualmente la caché de lame hace posible que sus estructuras de datos internas crezcan casi infinitamente, lo que puede causar retrasos significativos en el procesamiento de las consultas de los clientes A flaw was found in the way bind processes broken responses from authoritative servers. This caching mechanism could be abused by an attacker to significantly degrade resolver performance. • https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf https://kb.isc.org/v1/docs/cve-2021-25219 https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTKC4E3HUOLYN5 • CWE-20: Improper Input Validation •
CVSS: 9.8EPSS: 44%CPEs: 45EXPL: 0CVE-2021-25216 – A second vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack
https://notcve.org/view.php?id=CVE-2021-25216
In BIND 9.5.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.11.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch, BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND's default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting values for the tkey-gssapi-keytab or tkey-gssapi-credential configuration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. For servers that meet these conditions, the ISC SPNEGO implementation is vulnerable to various attacks, depending on the CPU architecture for which BIND was built: For named binaries compiled for 64-bit platforms, this flaw can be used to trigger a buffer over-read, leading to a server crash. For named binaries compiled for 32-bit platforms, this flaw can be used to trigger a server crash due to a buffer overflow and possibly also to achieve remote code execution. • http://www.openwall.com/lists/oss-security/2021/04/29/1 http://www.openwall.com/lists/oss-security/2021/04/29/2 http://www.openwall.com/lists/oss-security/2021/04/29/3 http://www.openwall.com/lists/oss-security/2021/04/29/4 https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf https://kb.isc.org/v1/docs/cve-2021-25215 https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html https://security.netapp.com/advisory/ntap-20210521-0006 http • CWE-125: Out-of-bounds Read •
CVSS: 7.5EPSS: 6%CPEs: 48EXPL: 0CVE-2021-25215 – An assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itself
https://notcve.org/view.php?id=CVE-2021-25215
In BIND 9.0.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a query for a record triggering the flaw described above, the named process will terminate due to a failed assertion check. The vulnerability affects all currently maintained BIND 9 branches (9.11, 9.11-S, 9.16, 9.16-S, 9.17) as well as all other versions of BIND 9. En BIND versiones 9.0.0 posteriores a 9.11.29, versiones 9.12.0 posteriores a 9.16.13, y BIND versiones 9.9.3-S1 posteriores a 9.11.29-S1 y versiones 9.16.8-S1 posteriores a 9.16.13-S1 de BIND Supported Preview Edition, así como versiones de lanzamiento 9.17.0 posteriores a 9.17.11 de la rama de desarrollo de BIND versión 9.17, cuando una versión vulnerable de named recibe una consulta para un registro que desencadena un fallo descrito anteriormente, el proceso named terminará debido a un comprobación de afirmación fallido. La vulnerabilidad afecta a todas las ramas de BIND 9 que se mantienen actualmente (9.11, 9.11-S, 9.16, 9.16-S, 9.17), así como a todas las demás versiones de BIND 9 A flaw was found in bind. The way DNAME records are processed may trigger the same RRset to the ANSWER section to be added more than once which causes an assertion check to fail. • http://www.openwall.com/lists/oss-security/2021/04/29/1 http://www.openwall.com/lists/oss-security/2021/04/29/2 http://www.openwall.com/lists/oss-security/2021/04/29/3 http://www.openwall.com/lists/oss-security/2021/04/29/4 https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf https://kb.isc.org/v1/docs/cve-2021-25215 https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html https://lists.fedoraproject.org/archives/list/package-announce& • CWE-617: Reachable Assertion •