Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

A flaw in the "deny-answer-aliases" feature can cause an assertion failure in named

Disclosure Date: January 16, 2019 •
CVE-2018-5740 CVSS v3 Base Score: 7.5
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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CVSS V3 Severity and Metrics
Base Score:
7.5 High
Impact Score:
3.6
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
BIND 9 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
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • canonical,
  • debian,
  • hp,
  • isc,
  • netapp,
  • opensuse,
  • redhat

Products

  • bind,
  • data ontap edge -,
  • debian linux 8.0,
  • debian linux 9.0,
  • enterprise linux desktop 6.0,
  • enterprise linux desktop 7.0,
  • enterprise linux server 6.0,
  • enterprise linux server 7.0,
  • enterprise linux server aus 7.6,
  • enterprise linux server eus 7.5,
  • enterprise linux server eus 7.6,
  • enterprise linux workstation 6.0,
  • enterprise linux workstation 7.0,
  • hp-ux -,
  • leap 15.0,
  • leap 15.1,
  • leap 42.3,
  • ubuntu linux 12.04,
  • ubuntu linux 14.04,
  • ubuntu linux 16.04,
  • ubuntu linux 18.04
Technical Analysis