CVE-2020-8618

A buffer boundary check assertion in rdataset.c can fail incorrectly during zone transfer

Description

An attacker who is permitted to send zone data to a server via zone transfer can exploit this to intentionally trigger the assertion failure with a specially constructed zone, denying service to clients.

Remediation

Solution:

  • Upgrade to the patched release most closely related to your current version of BIND: BIND 9.16.4

Workaround:

  • None

Category

4.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.01% Top 20%
Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory isc.org
Affected: ISC BIND9
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2020-8618?
CVE-2020-8618 has been scored as a medium severity vulnerability.
How to fix CVE-2020-8618?
To fix CVE-2020-8618: Upgrade to the patched release most closely related to your current version of BIND: BIND 9.16.4
Is CVE-2020-8618 being actively exploited in the wild?
It is possible that CVE-2020-8618 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-8618?
CVE-2020-8618 affects ISC BIND9.
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