CHMLib’s LZX Decompression: When Integer Overflows Attack!
Beware: CHMLib 0.40a’s LZX decompression has an integer overflow vulnerability that makes it more unstable than a Jenga tower at a toddler’s birthday party. Handle with care—or better yet, update!
Hot Take:
CHMLib’s new motto: “Overflowing with potential!” As if 2025 didn’t have enough troubles, CHMLib joins the chaos parade with an integer overflow vulnerability. Let’s hope this isn’t the start of a new trend in software bugs that make us question if our computers are plotting against us.
Key Points:
- CHMLib version 0.40 is vulnerable to an integer overflow.
- The issue lies in the LZX decompression routines, specifically in lzx.c.
- Malicious CHM files can exploit this by supplying out-of-range values.
- The vulnerability affects operations in lzx_read_lens and LZXdecompress.
- Crafty hackers can manipulate compressed block processing to their advantage.
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