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Fencer Vulns
medium 4.9

CVE-2020-8619 json

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

published 2020-06-17 6 y ago modified 2026-09-01 2 mo ago also EUVD-2020-29467

cvss
4.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

In ISC BIND9 versions BIND 9.11.14 -> 9.11.19, BIND 9.14.9 -> 9.14.12, BIND 9.16.0 -> 9.16.3, BIND Supported Preview Edition 9.11.14-S1 -> 9.11.19-S1: Unless a nameserver is providing authoritative service for one or more zones and at least one zone contains an empty non-terminal entry containing an asterisk ("*") character, this defect cannot be encountered. A would-be attacker who is allowed to change zone content could theoretically introduce such a record in order to exploit this condition to cause denial of service, though we consider the use of this vector unlikely because any such attack would require a significant privilege level and be easily traceable.

Patch / fix

  • bind9 Debian 14, Debian 13, Debian 12 1:9.16.4-1

debian advisories DEBIAN-CVE-2020-8619

  • bind9 Ubuntu 20.04 LTS 1:9.16.1-0ubuntu2.2

ubuntu advisories UBUNTU-CVE-2020-8619

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • bind RHEL 8 32:9.11.20-5.el8
  • bind-sdb RHEL 8 32:9.11.20-5.el8
  • bind-libs RHEL 8 32:9.11.20-5.el8
  • bind-utils RHEL 8 32:9.11.20-5.el8
  • bind-chroot RHEL 8 32:9.11.20-5.el8
  • bind-pkcs11 RHEL 8 32:9.11.20-5.el8
  • bind-license RHEL 8 32:9.11.20-5.el8
  • python3-bind RHEL 8 32:9.11.20-5.el8

red hat advisories RHSA-2020:4500

  • bind SLES for SAP 15, SLES 15-LTSS, SLE Module for Server Applications 15 SP2 +5 more 9.16.6-12.32.1
  • sysuser-tools SLES for SAP 15, SLES 15-LTSS, SLE Module for Development Tools 15 SP2 +4 more 2.0-4.2.8

suse advisories SUSE-SU-2020:2914-1

  • bind openSUSE Tumbleweed 9.16.20-1.4
  • bind openSUSE Leap 15.1 9.16.6-lp151.11.9.1
  • libuv openSUSE Leap 15.1 1.18.0-lp151.3.3.1
  • sysuser-tools openSUSE Leap 15.1 2.0-lp151.4.3.1
  • bind openSUSE Leap 15.2 9.16.6-lp152.14.3.1
  • libuv openSUSE Leap 15.2 1.18.0-lp152.4.3.1
  • sysuser-tools openSUSE Leap 15.2 2.0-lp152.5.3.1

opensuse advisories openSUSE-SU-2024:10650-1openSUSE-SU-2020:1701-1openSUSE-SU-2020:1699-1

  • bind Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 9.16.4-r0

alpine advisories ALPINE-CVE-2020-8619

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • bind Arch Linux 9.16.4-1

arch linux advisories AVG-1191

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-8619 updated cvss 4.9

bind: asterisk character in an empty non-terminal can cause an assertion failure in rbtdb.c

  • Red Hat Enterprise Linux AppStream (v. 8) bind 9.11.20-5.el8, bind-sdb 9.11.20-5.el8, bind-libs 9.11.20-5.el8, bind-utils 9.11.20-5.el8, bind-chroot 9.11.20-5.el8, bind-pkcs11 9.11.20-5.el8, +6 more Red Hat Enterprise Linux BaseOS (v. 8) bind 9.11.20-5.el8, bind-export-libs 9.11.20-5.el8
    fixed: vendor fix RHSA-2020:4500
  • Red Hat Enterprise Linux 5 bind, bind97 Red Hat Enterprise Linux 6 bind, bind-sdb, bind-libs, bind-utils, bind-chroot Red Hat Enterprise Linux 7 bind, bind-sdb, bind-libs, bind-utils, bind-chroot, bind-pkcs11, +6 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.15% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected products

  • ISC BIND9

Classification

Weakness
  • CWE-404 Improper Resource Shutdown or Release

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.