What’s Vulnerable › Vulnerabilities

CVE-2020-8618: A buffer boundary check assertion in rdataset.c can fail incorrectly during zone transfer

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-17 · updated 2026-06-17
• Weakness: CWE-617

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.

Affected products

• Canonical Ubuntu Linux: 20.04
• ISC BIND: from 9.16.0 through 9.16.3
• NetApp Steelstore Cloud Integrated Storage: all versions
• openSUSE Leap: 15.1, 15.2

References

• 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-2020-8618
• https://security.netapp.com/advisory/ntap-20200625-0003/
• https://usn.ubuntu.com/4399-1/
• 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-2020-8618
• https://security.netapp.com/advisory/ntap-20200625-0003/
• https://usn.ubuntu.com/4399-1/

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