Remote server crash via null context dereference
Published Jun 6, 2024 · Updated Feb 13, 2025
Null-pointer dereference in libcoap a3ed466 allows remote attackers to crash a CoAP server through a resource deletion request. The thread-safe coap_delete_resource wrapper locks its caller-supplied context before deriving the owning context from the resource, so a null argument is dereferenced. The affected development snapshot requires thread-safe server support, and a reachable deletion handler lets an unauthenticated request terminate the server process.
Summary
What happened
Null-pointer dereference in libcoap a3ed466 allows remote attackers to crash a CoAP server through a resource deletion request. The thread-safe coap_delete_resource wrapper locks its caller-supplied context before deriving the owning context from the resource, so a null argument is dereferenced. The affected development snapshot requires thread-safe server support, and a reachable deletion handler lets an unauthenticated request terminate the server process.
The record
- CVE
- CVE-2023-51847
- Published
- Jun 6, 2024
- Updated
- Feb 13, 2025
- Vendor
- libcoap
- Product
- libcoap
- Classifications
- CWE-400, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 6, 2024CVE publishedPublication date reported by the CVE source.
- 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?
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- Affected versionversion=v.a3ed466
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
- Issue 1302 crash reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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