Home/CVE/"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS
CVE

CVE-2018-5740

"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS

"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.

HIGH · CVSS 7.5 EPSS 0.6453
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-617Reachable Assertion
▤

Affected Products & Versions

16
isc bind>= 9.7.0 and < 9.8.8
isc bind>= 9.9.0 and < 9.9.13
isc bind>= 9.10.0 and < 9.10.8
isc bind>= 9.11.0 and < 9.11.4
isc bind>= 9.12.0 and < 9.12.2
isc bind>= 9.13.0 and < 9.13.2
redhat enterprise linux desktopall versions
redhat enterprise linux serverall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-officer@isc.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Jan 2019 · 08:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

9
suse-csafSUSE-SU-2019:2502-1
suse-csafopenSUSE-SU-2019:1533-1
suse-csafSUSE-SU-2019:1449-1
suse-csafSUSE-SU-2019:14074-1
suse-csafSUSE-SU-2019:1407-1
🔗

References & Sources

12
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00026.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00027.htmlMailing ListThird Party Advisory
http://www.securityfocus.com/bid/105055Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041436Third Party AdvisoryVDB Entry
https://kb.isc.org/docs/aa-01639Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00033.htmlThird Party Advisory
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