Process crash via unchecked NULL string argument
Published Apr 26, 2024 · Updated Aug 2, 2024
NULL pointer dereference in cJSON 1.7.17 allows attackers to crash a calling process through cJSON_SetValuestring. The function passes its unchecked valuestring argument to strlen and then strcpy, so a NULL second argument is dereferenced before validation. Exploitation requires a consuming application to invoke the API with a NULL valuestring; the resulting segmentation fault terminates that process.
Summary
What happened
NULL pointer dereference in cJSON 1.7.17 allows attackers to crash a calling process through cJSON_SetValuestring. The function passes its unchecked valuestring argument to strlen and then strcpy, so a NULL second argument is dereferenced before validation. Exploitation requires a consuming application to invoke the API with a NULL valuestring; the resulting segmentation fault terminates that process.
The record
- CVE
- CVE-2024-31755
- Published
- Apr 26, 2024
- Updated
- Aug 2, 2024
- Vendor
- cJSON Project
- Product
- cJSON
- Classifications
- CWE-476, T1499
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 26, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 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?
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- Affected versionversion=1.7.17
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
- cJSON_SetValuestring NULL-argument proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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