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CVE-2020-25829

HIGH
7.5
CVSS Score
Published: October 16, 2020 at 05:07 AM UTC
Updated: June 17, 2026 at 03:07 AM UTC
3 products affected across 2 vendorsLeapBackports SleRecursor

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Severity
HIGH7.5
Exploit prediction
EPSS 7%

Description

An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5. A remote attacker can cause the cached records for a given name to be updated to the Bogus DNSSEC validation state, instead of their actual DNSSEC Secure state, via a DNS ANY query. This results in a denial of service for installation that always validate (dnssec=validate), and for clients requesting validation when on-demand validation is enabled (dnssec=process).

Affected

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

Backports Sle· openSUSE
95%
15.0 sp115.0 sp2
Leap· openSUSEdrupal
95%
15.115.2
Recursor· Powerdns
95%
v < 4.1.184.2.0 ≤ v < 4.2.54.3.0 ≤ v < 4.3.5
Affected range stops below 4.1.18, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.2.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.3.5, 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:

Patch and advisory references

References (3)

Vendor Advisoryx_refsource_SUSEThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00036.html
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.html
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202012-19

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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