CVSS: 7.5EPSS: 0%CPEs: 2EXPL: 0CVE-2019-6475 – A flaw in mirror zone validity checking can allow zone data to be spoofed
https://notcve.org/view.php?id=CVE-2019-6475
Mirror zones are a BIND feature allowing recursive servers to pre-cache zone data provided by other servers. A mirror zone is similar to a zone of type secondary, except that its data is subject to DNSSEC validation before being used in answers, as if it had been looked up via traditional recursion, and when mirror zone data cannot be validated, BIND falls back to using traditional recursion instead of the mirror zone. However, an error in the validity checks for the incoming zone data can allow an on-path attacker to replace zone data that was validated with a configured trust anchor with forged data of the attacker's choosing. The mirror zone feature is most often used to serve a local copy of the root zone. If an attacker was able to insert themselves into the network path between a recursive server using a mirror zone and a root name server, this vulnerability could then be used to cause the recursive server to accept a copy of falsified root zone data. • https://kb.isc.org/docs/cve-2019-6475 https://security.netapp.com/advisory/ntap-20191024-0004 https://support.f5.com/csp/article/K42238532?utm_source=f5support&%3Butm_medium=RSS • CWE-345: Insufficient Verification of Data Authenticity •
CVSS: 7.5EPSS: 0%CPEs: 3EXPL: 1CVE-2019-6467 – An error in the nxdomain redirect feature can cause BIND to exit with an INSIST assertion failure in query.c
https://notcve.org/view.php?id=CVE-2019-6467
A programming error in the nxdomain-redirect feature can cause an assertion failure in query.c if the alternate namespace used by nxdomain-redirect is a descendant of a zone that is served locally. The most likely scenario where this might occur is if the server, in addition to performing NXDOMAIN redirection for recursive clients, is also serving a local copy of the root zone or using mirroring to provide the root zone, although other configurations are also possible. Versions affected: BIND 9.12.0-> 9.12.4, 9.14.0. Also affects all releases in the 9.13 development branch. Un error de programación en la funcionalidad nxdomain-redirect puede causar un error de aserción en el archivo query.c, si el espacio de nombres alternativo utilizado por nxdomain-redirect es un descendiente de una zona que es servida localmente. • https://github.com/knqyf263/CVE-2019-6467 https://kb.isc.org/docs/cve-2019-6467 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 •
CVSS: 5.3EPSS: 0%CPEs: 15EXPL: 0CVE-2019-6465 – Zone transfer controls for writable DLZ zones were not effective
https://notcve.org/view.php?id=CVE-2019-6465
Controls for zone transfers may not be properly applied to Dynamically Loadable Zones (DLZs) if the zones are writable Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.5-P2, 9.12.0 -> 9.12.3-P2, and versions 9.9.3-S1 -> 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 -> 9.13.6 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2019-6465. Los controles para las transferencias de zona pueden no ser aplicados correctamente en Dynamically Loadable Zones (DLZs) si las zonas son grabables. Versiones afectadas: BIND 9.9.0 hasta 9.10.8-P1, 9.11.0 hasta 9.11.5-P2, 9.12.0 hasta 9.12.3-P2, y versiones 9.9.3-S1 hasta 9.11.5-S3 de BIND 9 Supported Preview Edition. • https://access.redhat.com/errata/RHSA-2019:3552 https://kb.isc.org/docs/cve-2019-6465 https://access.redhat.com/security/cve/CVE-2019-6465 https://bugzilla.redhat.com/show_bug.cgi?id=1679304 • CWE-284: Improper Access Control CWE-732: Incorrect Permission Assignment for Critical Resource •