CVE-2020-8623high

CVE-2020-8623: high-severity vulnerability in ISC BIND9

A flaw in native PKCS#11 code can lead to a remotely triggerable assertion failure in pk11.c

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 6.6%
In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with "--enable-native-pkcs11" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
ISC · BIND9
Related CVEs — ISC BIND9

In the same product, most dangerous first.

CVE-2020-8617HIGHA logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.cEPSS 93.3%CVE-2021-25216HIGHA second vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attackEPSS 83.0%CVE-2020-8625HIGHA vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attackEPSS 64.2%CVE-2021-25215HIGHAn assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itselfEPSS 11.7%CVE-2021-25219MEDIUMLame cache can be abused to severely degrade resolver performanceEPSS 11.2%CVE-2020-8616HIGHBIND does not sufficiently limit the number of fetches performed when processing referralsEPSS 10.9%