CVE-2023-33933Network attack vector

Sensitive data exposure via s3_auth hash miscalculation

Published Jun 14, 2023 · Updated Feb 13, 2025

Information disclosure in Apache Traffic Server 8.0.0 through 9.2.0 allows remote attackers to obtain sensitive data via s3_auth. The s3_auth plugin miscalculates the hash used to sign S3-bound proxy requests; Apache has not disclosed the exact arithmetic or input-handling error. Exposure requires a deployment that enables s3_auth for S3-bound traffic, and the published impact is limited to confidentiality.

CVSS severity7.5
High
EPSS probability1.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Apache Traffic Server 8.0.0 through 9.2.0 allows remote attackers to obtain sensitive data via s3_auth. The s3_auth plugin miscalculates the hash used to sign S3-bound proxy requests; Apache has not disclosed the exact arithmetic or input-handling error. Exposure requires a deployment that enables s3_auth for S3-bound traffic, and the published impact is limited to confidentiality.

The record

CVE
CVE-2023-33933
Published
Jun 14, 2023
Updated
Feb 13, 2025
Vendor
The Apache Software Foundation
Product
Apache Traffic Server
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 14, 2023CVE 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=8.0.0 <=8.1.6
  2. Affected versionversion=8.0.0 <=9.2.0
  3. Affected versionversion=9.0.0 <=9.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Traffic Serverversion=8.0.0 <=8.1.6; version=8.0.0 <=9.2.0; version=9.0.0 <=9.2.0

Published CVSS scores

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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

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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