CVE-2020-6080Network attack vector

Service crash via leaked TXT record allocations

Published Mar 24, 2020 · Updated Aug 4, 2024

Resource exhaustion in Videolabs libmicrodns 0.1.0 allows remote attackers to crash an mDNS-consuming service via crafted TXT answers. The rr_read_TXT function returns on an invalid final string length without freeing TXT structures allocated for earlier strings in the same RDATA section. Repeated unauthenticated mDNS messages exhaust the embedding process's memory; the consequence is limited to interruption of that process.

CVSS severity7.5
High
EPSS probability2.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Videolabs libmicrodns 0.1.0 allows remote attackers to crash an mDNS-consuming service via crafted TXT answers. The rr_read_TXT function returns on an invalid final string length without freeing TXT structures allocated for earlier strings in the same RDATA section. Repeated unauthenticated mDNS messages exhaust the embedding process's memory; the consequence is limited to interruption of that process.

The record

CVE
CVE-2020-6080
Published
Mar 24, 2020
Updated
Aug 4, 2024
Vendor
Videolabs
Product
libmicrodns
Classifications
CWE-401, CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Videolabs libmicrodns 0.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Videolabs · libmicrodnsversion=Videolabs libmicrodns 0.1.0

Published CVSS scores

7.5Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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