PT-2026-64863 · Dave Gamble · Cjson
CVSS v4.0
5.1
Medium
| Vector | AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:L/SI:L/SA:L |
cJSON library is vulnerable to an integer overflow in the print string ptr() function in cJSON.c on 32-bit platforms. The escape characters counter, a 32-bit size t, can wrap around when processing strings containing approximately 858,993,460 or more control characters, causing the output buffer to be allocated based on an underestimated length. When cJSON PrintBuffered() is used with a pre-allocated buffer, the subsequent write loop overflows the heap allocation. An attacker supplying a crafted JSON string to an application using cJSON on a 32-bit platform can cause a heap buffer overflow, potentially leading to remote code execution, information disclosure, or denial of service.
Because project creator contact attempts were unsuccessful, the vulnerability has only been confirmed in version 1.7.19 but may also affect other versions.
Fix
Integer Overflow
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Weakness Enumeration
Related Identifiers
Affected Products
Cjson