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Vulnerabilities

Vulnerability · CVE-2020-8618

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, deny

Published Jun 17, 2020 · catalog updated Oct 26, 2026 · An attacker who is

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2020-8618. EPSS is 1.88%. Act only if a listed version of An attacker who is is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (An attacker who is).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.88%
Remediation
Advisory link
Affected products
Alpine:v3.10 bind · Alpine:v3.11 bind · Alpine:v3.12 bind · Alpine:v3.13 bind · Alpine:v3.14 bind · Alpine:v3.15 bind

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Alpine:v3.10 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.11 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.12 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.13 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.14 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.15 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.16 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.17 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.18 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.19 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.20 bind9.16.0 → 9.16.4-r0
  • Alpine:v3.21 bind9.16.0 → 9.16.4-r0
  • Debian:12 bind90 → 1:9.16.4-1
  • Debian:13 bind90 → 1:9.16.4-1
  • Debian:14 bind90 → 1:9.16.4-1

How to fix CVE-2020-8618

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2020-8618. EPSS is 1.88%. Act only if a listed version of An attacker who is is installed.

Which versions are affected?

Compare what you have installed with 9.16.0 → 9.16.4-r0, 0 → 1:9.16.4-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 1.88%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 17, 2020 · OpenSSF OSV / OSV Scanner

    Detected

    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.

  2. Oct 26, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.16.4-1; bind9 fixed in 1:9.16.4-1; bind9 fixed in 1:9.16.4-1

  3. Oct 26, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.16.4-1

  4. Oct 26, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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.

  5. Oct 26, 2026 · Trivy Vulnerability DB

    Fix available

    bind fixed in 9.16.4-r0; bind fixed in 9.16.4-r0; bind fixed in 9.16.4-r0; bind fixed in 9.16.4-r0

  6. Oct 26, 2026 · Trivy Vulnerability DB

    Fix available

    bind fixed in 9.16.4-r0

  7. Oct 26, 2026 · Trivy Vulnerability DB

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2020-8618

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-8618

    30-day exploitation probability 1.88%

    first.org
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2020-8618
    osv.dev
  • Trivy Vulnerability DBPackage advisoryALPINE-CVE-2020-8618

    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.

    osv.dev

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 3, 2026
  • CVE.orgOct 26, 2026
  • Trivy Vulnerability DBOct 26, 2026
  • OpenSSF OSV / OSV ScannerOct 26, 2026