CVSS: 7.5EPSS: 2%CPEs: 11EXPL: 0CVE-2019-6477 – TCP-pipelined queries can bypass tcp-clients limit
https://notcve.org/view.php?id=CVE-2019-6477
With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection to a server could consume more resources than the server has been provisioned to handle. When a TCP connection with a large number of pipelined queries is closed, the load on the server releasing these multiple resources can cause it to become unresponsive, even for queries that can be answered authoritatively or from cache. (This is most likely to be perceived as an intermittent server problem). Con pipelining habilitada, cada consulta entrante en una conexión TCP requiere una asignación de recursos similar a una consulta recibida por medio de UDP o TCP sin pipelining habilitada. • http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html https://kb.isc.org/docs/cve-2019-6477 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3DEMNZMKR57VQJCG5ZN55ZGTQRL2TFQ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XGURMGQHX45KR4QDRCSUQHODUFOGNGAN https://support.f5.com/csp/article/K15840535?utm_source=f5support&%3Butm_medium=RSS http • CWE-400: Uncontrolled Resource Consumption •
CVSS: 7.5EPSS: 0%CPEs: 2EXPL: 0CVE-2019-6469 – BIND Supported Preview Edition can exit with an assertion failure if ECS is in use
https://notcve.org/view.php?id=CVE-2019-6469
An error in the EDNS Client Subnet (ECS) feature for recursive resolvers can cause BIND to exit with an assertion failure when processing a response that has malformed RRSIGs. Versions affected: BIND 9.10.5-S1 -> 9.11.6-S1 of BIND 9 Supported Preview Edition. Un error en la funcionalidad EDNS Client Subnet (ECS) para los solucionadores recursivos puede hacer que BIND salga con un fallo de aserción cuando se procesa una respuesta que tiene RRSIG malformados. Versiones afectadas: BIND 9.10.5-S1 hasta 9.11.6-S1 de BIND 9 Supported Preview Edition. • https://kb.isc.org/docs/cve-2019-6469 https://support.f5.com/csp/article/K39751401?utm_source=f5support&%3Butm_medium=RSS • CWE-617: Reachable Assertion •
CVSS: 7.5EPSS: 0%CPEs: 2EXPL: 0CVE-2019-6468 – BIND Supported Preview Edition can exit with an assertion failure if nxdomain-redirect is used
https://notcve.org/view.php?id=CVE-2019-6468
In BIND Supported Preview Edition, an error in the nxdomain-redirect feature can occur in versions which support EDNS Client Subnet (ECS) features. In those versions which have ECS support, enabling nxdomain-redirect is likely to lead to BIND exiting due to assertion failure. Versions affected: BIND Supported Preview Edition version 9.10.5-S1 -> 9.11.5-S5. ONLY BIND Supported Preview Edition releases are affected. En BIND Supported Preview Edition, puede presentarse un error en la funcionalidad nxdomain-redirect en las versiones que admiten las funcionalidades EDNS Client Subnet (ECS). • https://kb.isc.org/docs/cve-2019-6468 https://www.synology.com/security/advisory/Synology_SA_19_20 • CWE-617: Reachable Assertion •
CVSS: 5.9EPSS: 0%CPEs: 109EXPL: 0CVE-2019-6471 – A race condition when discarding malformed packets can cause BIND to exit with an assertion failure
https://notcve.org/view.php?id=CVE-2019-6471
A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -> 9.11.7, 9.12.0 -> 9.12.4-P1, 9.14.0 -> 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -> 9.11.7-S1. Una condición de carrera que puede presentarse al descartar paquetes malformados puede provocar la salida de BIND debido a un fallo de aserción de REQUIRE en el archivo dispatch.c. Versiones afectadas: BIND 9.11.0 hasta 9.11.7, 9.12.0 hasta 9.12.4-P1, 9.14.0 hasta 9.14.2. • https://kb.isc.org/docs/cve-2019-6471 https://support.f5.com/csp/article/K10092301?utm_source=f5support&%3Butm_medium=RSS https://access.redhat.com/security/cve/CVE-2019-6471 https://bugzilla.redhat.com/show_bug.cgi?id=1721780 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-617: Reachable Assertion •
CVSS: 8.6EPSS: 0%CPEs: 78EXPL: 0CVE-2018-5743 – Limiting simultaneous TCP clients was ineffective
https://notcve.org/view.php?id=CVE-2018-5743
By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. • https://kb.isc.org/docs/cve-2018-5743 https://support.f5.com/csp/article/K74009656?utm_source=f5support&%3Butm_medium=RSS https://www.synology.com/security/advisory/Synology_SA_19_20 https://access.redhat.com/security/cve/CVE-2018-5743 https://bugzilla.redhat.com/show_bug.cgi?id=1702541 • CWE-770: Allocation of Resources Without Limits or Throttling •