CVE-2015-4620

Bind vulnerability

CVSS

7.8

EPSS

37.9%

EPSS pct

98th

Exploited

No known

name.c in named in ISC BIND 9.7.x through 9.9.x before 9.9.7-P1 and 9.10.x before 9.10.2-P2, when configured as a recursive resolver with DNSSEC validation, allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) by constructing crafted zone data and then making a query for a name in that zone.

Affected vendor

Isc

Affected product

Bind

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Weakness type (CWE)

CWE-17

Published

2015-07-08

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to complete impact to availability.

Its EPSS score of 37.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2015-4620

Confirm whether Isc Bind is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2015-4620.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-4620

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-4620 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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