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-2019-6476 – An error in QNAME minimization code can cause BIND to exit with an assertion failure
https://notcve.org/view.php?id=CVE-2019-6476
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4. Un defecto en el código agregado para soportar la minimización de QNAME puede causar que un nombrado salga con un error de aserción si un reenviador devuelve una referencia en lugar de resolver la consulta. Esto afecta a BIND versiones 9.14.0 hasta 9.14.6 y 9.15.0 hasta 9.15.4. • https://kb.isc.org/docs/cve-2019-6476 https://security.netapp.com/advisory/ntap-20191024-0004 https://support.f5.com/csp/article/K42238532?utm_source=f5support&%3Butm_medium=RSS • CWE-617: Reachable Assertion •
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: 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 •