UpHeron
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Servers and applications

CVE-2018-5740

"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13,…

Severity
High 7.5
Published
16 Jan 2019
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.8.8, 9.9.13, 9.10.8, 9.11.4, 9.12.2, 9.13.2
Exploit chance
60% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness
CWE-617
Attack
Over the network · No login needed · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Description

"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2.

From NVD.

Affected software

SoftwareAffected versions
BIND 9Servers and applications · cpe:a:isc:bind
  • From 9.7.0 before 9.8.8
  • From 9.9.0 before 9.9.13
  • From 9.10.0 before 9.10.8
  • From 9.11.0 before 9.11.4
  • From 9.12.0 before 9.12.2
  • From 9.13.0 before 9.13.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-5740
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-5740