| 제목 | https://code-projects.org/ blog site in php with source code 1.0 SQL Injection |
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| 설명 | The vulnerability resides within the category_exists function in resources/functions/blog.php, which handles user input processed via add_category.php. Although the code attempts to sanitize user input ($name and $field) using the mysql_real_escape_string() function, this defense mechanism is insufficient and inherently flawed, particularly because the program relies on the deprecated and unsafe mysql_\* extension.
The code is vulnerable to Wide-Byte Injection. If the database connection is configured to use a multi-byte character set, such as GBK or BIG5, an attacker can prepend their malicious payload with a specific leading byte (e.g., 0xdf in GBK).
When mysql_real_escape_string() encounters a single quote ('), it prefixes it with a backslash (\, or 0x5c). The vulnerable database server, interpreting the payload as a multi-byte stream, combines the attacker's leading byte (0xdf) with the inserted backslash (0x5c) to form a new, valid, non-backslash multi-byte character. This effectively consumes the backslash, allowing the subsequent single quote to escape and close the SQL string prematurely, leading to injection. |
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| 원천 | ⚠️ https://github.com/Yohane-Mashiro/cve/blob/main/SQL%20injection1.md |
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| 사용자 | Yohane-Mashiro (UID 92825) |
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| 제출 | 2025. 11. 20. PM 05:22 (5 개월 ago) |
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| 모더레이션 | 2025. 11. 23. AM 08:54 (3 days later) |
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| 상태 | 수락 |
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| VulDB 항목 | 333339 [code-projects Blog Site 1.0 Category blog.php category_exists name/field SQL 주입] |
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| 포인트들 | 20 |
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