CVE-2022-32749Network attack vector

Server crash via unhandled AuthProxy write-ready event

Published Dec 19, 2022 · Updated Apr 17, 2025

Improper exceptional-condition handling in Apache Traffic Server 8.0.0 through 9.1.3 allows remote attackers to crash the server via requests. The AuthProxy request-write state table omits the WRITE_READY event, so an expected nonblocking socket state reaches the plugin without a handler instead of resuming buffered output. The AuthProxy plugin must be configured; crafted traffic can interrupt proxy service without authentication or user interaction.

CVSS severity7.5
High
EPSS probability1.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper exceptional-condition handling in Apache Traffic Server 8.0.0 through 9.1.3 allows remote attackers to crash the server via requests. The AuthProxy request-write state table omits the WRITE_READY event, so an expected nonblocking socket state reaches the plugin without a handler instead of resuming buffered output. The AuthProxy plugin must be configured; crafted traffic can interrupt proxy service without authentication or user interaction.

The record

CVE
CVE-2022-32749
Published
Dec 19, 2022
Updated
Apr 17, 2025
Vendor
The Apache Software Foundation
Product
Apache Traffic Server
Classifications
CWE-754, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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?

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  1. Affected versionversion=8.0.0 <=9.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Traffic Serverversion=8.0.0 <=9.1.3

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS: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

CWE-754Improper Check for Unusual or Exceptional Conditions
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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