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CVSS: 4.9EPSS: 0%CPEs: 12EXPL: 0

"managed-keys" is a feature which allows a BIND resolver to automatically maintain the keys used by trust anchors which operators configure for use in DNSSEC validation. Due to an error in the managed-keys feature it is possible for a BIND server which uses managed-keys to exit due to an assertion failure if, during key rollover, a trust anchor's keys are replaced with keys which use an unsupported algorithm. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.5-P1, 9.12.0 -> 9.12.3-P1, 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-2018-5745. • https://access.redhat.com/errata/RHSA-2019:3552 https://kb.isc.org/docs/cve-2018-5745 https://access.redhat.com/security/cve/CVE-2018-5745 https://bugzilla.redhat.com/show_bug.cgi?id=1679303 • CWE-327: Use of a Broken or Risky Cryptographic Algorithm CWE-617: Reachable Assertion •

CVSS: 7.5EPSS: 0%CPEs: 2EXPL: 0

While backporting a feature for a newer branch of BIND9, RedHat introduced a path leading to an assertion failure in buffer.c:420. Affects RedHat versions bind-9.9.4-65.el7 -> bind-9.9.4-72.el7. No ISC releases are affected. Other packages from other distributions who made the same error may also be affected. Mientras se ejecuta un backport de una característica para una nueva rama de BIND9, RedHat introdujo una ruta que conlleva a un fallo de aserción en buffer.c:420. • https://access.redhat.com/security/cve/cve-2018-5742 https://access.redhat.com/security/cve/CVE-2018-5742 https://bugzilla.redhat.com/show_bug.cgi?id=1655844 • CWE-400: Uncontrolled Resource Consumption CWE-617: Reachable Assertion •

CVSS: 6.5EPSS: 0%CPEs: 2EXPL: 0

To provide fine-grained controls over the ability to use Dynamic DNS (DDNS) to update records in a zone, BIND 9 provides a feature called update-policy. Various rules can be configured to limit the types of updates that can be performed by a client, depending on the key used when sending the update request. Unfortunately, some rule types were not initially documented, and when documentation for them was added to the Administrator Reference Manual (ARM) in change #3112, the language that was added to the ARM at that time incorrectly described the behavior of two rule types, krb5-subdomain and ms-subdomain. This incorrect documentation could mislead operators into believing that policies they had configured were more restrictive than they actually were. This affects BIND versions prior to BIND 9.11.5 and BIND 9.12.3. • http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html http://www.securityfocus.com/bid/105379 http://www.securitytracker.com/id/1041674 https://access.redhat.com/errata/RHSA-2019:2057 https://kb.isc.org/docs/cve-2018-5741 https://security.gentoo.org/glsa/201903-13 https://security.netapp.com/advisory/ntap-20190830-0001 https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&doc • CWE-284: Improper Access Control CWE-863: Incorrect Authorization •

CVSS: 7.5EPSS: 94%CPEs: 26EXPL: 0

"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2. "deny-answer-aliases" es una característica poco utilizada que pretende ayudar a los operadores recursivos del servidor a proteger a los usuarios finales contra ataques de reenlace DNS, un método para poder eludir el modelo de seguridad empleado por los navegadores del cliente. Sin embargo, un defecto en esta característica hace que sea sencillo experimentar un fallo de aserción en name.c. • http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00026.html http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00027.html http://www.securityfocus.com/bid/105055 http://www.securitytracker.com/id/1041436 https://access.redhat.com/errata/RHSA-2018:2570 https://access.redhat.com/errata/RHSA-2018:2571 https://kb.isc.org/docs/aa-01639 https://lists.debian.org/debian-lts-announce/2018/08/msg00033.html https://lists.debian.org/debian-lts-announce/2021/11&#x • CWE-617: Reachable Assertion •

CVSS: 7.5EPSS: 5%CPEs: 72EXPL: 0

BIND was improperly sequencing cleanup operations on upstream recursion fetch contexts, leading in some cases to a use-after-free error that can trigger an assertion failure and crash in named. Affects BIND 9.0.0 to 9.8.x, 9.9.0 to 9.9.11, 9.10.0 to 9.10.6, 9.11.0 to 9.11.2, 9.9.3-S1 to 9.9.11-S1, 9.10.5-S1 to 9.10.6-S1, 9.12.0a1 to 9.12.0rc1. BIND secuenciaba incorrectamente las operaciones de limpieza en contextos fetch de recursión ascendente, lo que conduce en algunos casos a un error de uso de memoria previamente liberada que puede desencadenar un fallo de aserción y un cierre inesperado en named. Afecta a BIND desde la versión 9.0.0 hasta la versión 9.8.x, desde la versión 9.9.0 hasta la versión 9.9.11, desde la versión 9.10.0 hasta la versión 9.10.6, desde la versión 9.11.0 hasta la versión 9.11.2, desde la versión 9.9.3-S1 hasta la versión 09.9.11-S1, desde la versión 9.10.5-S1 hasta la versión 9.10.6-S1 y desde la 9.12.0a1 hasta la 9.12.0rc1. A use-after-free flaw leading to denial of service was found in the way BIND internally handled cleanup operations on upstream recursion fetch contexts. • http://www.securityfocus.com/bid/102716 http://www.securitytracker.com/id/1040195 https://access.redhat.com/errata/RHSA-2018:0101 https://access.redhat.com/errata/RHSA-2018:0102 https://access.redhat.com/errata/RHSA-2018:0487 https://access.redhat.com/errata/RHSA-2018:0488 https://kb.isc.org/docs/aa-01542 https://lists.debian.org/debian-lts-announce/2018/01/msg00029.html https://security.netapp.com/advisory/ntap-20180117-0003 https://supportportal.juniper.net/s/article/ • CWE-416: Use After Free •