CVE-2023-33933
Apache Traffic Server vulnerability analysis and mitigation

Overview

CVE-2023-33933 is a vulnerability affecting Apache Traffic Server, a reverse and forward proxy server. The vulnerability was discovered in versions from 8.0.0 through 9.2.0 and involves an s3_auth plugin problem with hash calculation. Users of version 8.x are advised to upgrade to 8.1.7 or later versions, while 9.x users should upgrade to 9.2.1 or later versions (NVD, Debian Security).

Technical details

The vulnerability is classified as an Exposure of Sensitive Information to an Unauthorized Actor (CWE-200). It has been assigned a CVSS v3.1 base score of 7.5 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, indicating that it is network-accessible, requires low attack complexity, needs no privileges or user interaction, and can result in high confidentiality impact (NVD).

Impact

The vulnerability primarily affects the confidentiality of information, with potential for exposure of sensitive information to unauthorized actors. The high CVSS score for confidentiality impact (C:H) suggests that the vulnerability could lead to significant information disclosure (NVD).

Mitigation and workarounds

The recommended mitigation is to upgrade to the fixed versions. For version 8.x, users should upgrade to 8.1.7 or later, and for version 9.x, users should upgrade to 9.2.1 or later. Various distributions have also released security updates: Debian has fixed the issue in version 8.1.7+ds-1~deb11u1 for bullseye and version 9.2.0+ds-1~deb12u1 for bookworm. Fedora has addressed the vulnerability in version 9.2.1-1 for both Fedora 37 and 38 (Debian Security, Fedora Update).

Additional resources


SourceThis report was generated using AI

Related Apache Traffic Server vulnerabilities:

CVE ID

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CISA KEV exploit

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Published date

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NoYesMar 06, 2025

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