Arbitrary code execution via heap buffer overwrite
Published Jan 31, 2023 · Updated Mar 27, 2025
Heap buffer overflow in sheredom json.h before commit 0825301a07cbf51653882bf2b153cc81fdadf41 allows attackers to execute arbitrary code. When json_parse_ex processes crafted JSON with the affected flags, json_parse_object advances state->dom without checking its allocation bound and writes location metadata past the heap buffer. A consuming application must enable the relevant nondefault parsing flags and process attacker-controlled JSON; the overwrite can crash the process or corrupt control data.
Summary
What happened
Heap buffer overflow in sheredom json.h before commit 0825301a07cbf51653882bf2b153cc81fdadf41 allows attackers to execute arbitrary code. When json_parse_ex processes crafted JSON with the affected flags, json_parse_object advances state->dom without checking its allocation bound and writes location metadata past the heap buffer. A consuming application must enable the relevant nondefault parsing flags and process attacker-controlled JSON; the overwrite can crash the process or corrupt control data.
The record
- CVE
- CVE-2022-45494
- Published
- Jan 31, 2023
- Updated
- Mar 27, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, CWE-122, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 31, 2023CVE publishedPublication date reported by the CVE source.
- Mar 27, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- json_parse_object crash1.zip reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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