Is CVE-2018-5740 in the CISA KEV catalog?

No. CVE-2018-5740 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-5740?

CVE-2018-5740 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-5740?

CVE-2018-5740 has an EPSS score of 59.35% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-5740?

Upgrade bind9 on debian 11 to 1:9.11.4.P1+dfsg-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-5740

HIGHEPSS 99th pctl

7.5

CVSS v3

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.

CWE-617

How to fix

Remediation Available

bind9Debian

Fixed in:1:9.11.4.P1+dfsg-1CVE-2018-5740

bind9Ubuntu

Fixed in:1:9.9.5.dfsg-3ubuntu0.18USN-3769-1

Fixed in:1:9.10.3.dfsg.P4-8ubuntu1.11USN-3769-1

Fixed in:1:9.11.3+dfsg-1ubuntu1.2USN-3769-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

59.35%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Vendor Advisory1

kb.isc.org

Third-Party Advisory13

Related Vulnerabilities

Other CWE-617 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-8617	High	7.5	93%	-	Fix
CVE-2020-36222	High	7.5	78%	-	Fix
CVE-2006-5779	High	7.5	75%	-	Fix
CVE-2021-27212	High	7.5	64%	-	Fix
CVE-2023-28425	Medium	5.5	55%	-	Fix
CVE-2016-8864	High	7.5	39%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.