CVE-2020-5591

HIGH
7.5
CVSS Score
Published: June 5, 2020 at 10:05 AM UTC
Updated: June 17, 2026 at 03:21 AM UTC
1 product affected across 1 vendorXACK DNS

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

XACK DNS 1.11.0 to 1.11.4, 1.10.0 to 1.10.8, 1.8.0 to 1.8.23, 1.7.0 to 1.7.18, and versions before 1.7.0 allow remote attackers to cause a denial of service condition resulting in degradation of the recursive resolver's performance or compromising the recursive resolver as a reflector in a reflection attack.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 1.7.18v < 1.7.01.10.0 ≤ v ≤ 1.10.81.11.0 ≤ v ≤ 1.11.41.8.0 ≤ v ≤ 1.8.23
Affected range stops below 1.7.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_MISCMitigationThird Party AdvisoryVDB Entry
https://jvn.jp/en/jp/JVN40208370/index.html
x_refsource_MISCVendor Advisory
https://xack.co.jp/info/?ID=622

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-674

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