CVE-2024-24788Network attack vector

DNS lookup hang via unhandled parser error

Published May 8, 2024 · Updated Feb 13, 2025

Denial of service in Go standard library net before 1.22.3 allows remote attackers to hang DNS lookups with a malformed DNS response. The extractExtendedRCode function ignores an error from Parser.SkipAdditional, so the parser position never advances and its loop repeats indefinitely. An attacker must control or impersonate a DNS responder queried through the pure Go resolver; a triggering reply consumes CPU and stalls the calling lookup.

CVSS severity5.9
Medium
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Go standard library net before 1.22.3 allows remote attackers to hang DNS lookups with a malformed DNS response. The extractExtendedRCode function ignores an error from Parser.SkipAdditional, so the parser position never advances and its loop repeats indefinitely. An attacker must control or impersonate a DNS responder queried through the pure Go resolver; a triggering reply consumes CPU and stalls the calling lookup.

The record

CVE
CVE-2024-24788
Published
May 8, 2024
Updated
Feb 13, 2025
Vendor
Go standard library
Product
net
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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=1.22.0-0 <1.22.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · netversion=1.22.0-0 <1.22.3

Published CVSS scores

5.9UbuntuCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5Oracle LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

T1499.004Application or System Exploitation

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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