CVE-2022-24070Network attack vector

Unauthenticated HTTPD crash via stale authz pointers

Published Apr 12, 2022 · Updated Aug 3, 2024

Use-after-free in Apache Subversion mod_dav_svn 1.10.0 through 1.14.1 allows remote attackers to crash HTTPD via authz requests. Its post_config hook caches authz object-pool pointers during a validation pass but does not reset them when HTTPD clears the underlying allocation pool. A later path-based authorization lookup dereferences the stale pointers; the resulting segmentation fault terminates one worker or the entire server process, depending on the configured MPM.

CVSS severity7.5
High
EPSS probability9.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Apache Subversion mod_dav_svn 1.10.0 through 1.14.1 allows remote attackers to crash HTTPD via authz requests. Its post_config hook caches authz object-pool pointers during a validation pass but does not reset them when HTTPD clears the underlying allocation pool. A later path-based authorization lookup dereferences the stale pointers; the resulting segmentation fault terminates one worker or the entire server process, depending on the configured MPM.

The record

CVE
CVE-2022-24070
Published
Apr 12, 2022
Updated
Aug 3, 2024
Vendor
The Apache Software Foundation
Product
Apache Subversion
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=1.10.0 to 1.14.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Subversionversion=1.10.0 to 1.14.1

Published CVSS scores

7.5Apache Software FoundationCVSS: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
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.

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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-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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