A flaw in native PKCS#11 code can lead to a remotely triggerable assertion failure in pk11.c
CVE-2020-8623

7.5HIGH

Key Information:

Vendor

Isc
Status
Bind9
Vendor
CVE Published:
21 August 2020

Badges

👾 Exploit Exists🟣 EPSS 18%

What is CVE-2020-8623?

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

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Affected Version(s)

BIND9 9.10.0

BIND9 < 9.11.22

BIND9 9.12.0

References

https://kb.isc.org/docs/cve-2020-8623
x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisoryx_refsource_FEDORA
https://security.netapp.com/advisory/ntap-20200827-0003/
x_refsource_CONFIRM

EPSS Score

18% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ISC would like to thank Lyu Chiy for bringing this vulnerability to our attention.
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