Krzysztof Kowalczyk

3 exploits Active since Oct 2024
CVE-2024-44337 WRITEUP MEDIUM WRITEUP
gomarkdown/markdown < 0.0.0-20240729212818-a2a9c4f76ef5 - Denial of Service via Infinite Loop in Paragraph Function
The package `github.com/gomarkdown/markdown` is a Go library for parsing Markdown text and rendering as HTML. Prior to pseudoversion `v0.0.0-20240729232818-a2a9c4f`, which corresponds with commit `a2a9c4f76ef5a5c32108e36f7c47f8d310322252`, there was a logical problem in the paragraph function of the parser/block.go file, which allowed a remote attacker to cause a denial of service (DoS) condition by providing a tailor-made input that caused an infinite loop, causing the program to hang and consume resources indefinitely. Submit `a2a9c4f76ef5a5c32108e36f7c47f8d310322252` contains fixes to this problem.
CVSS 5.1
CVE-2026-25920 WRITEUP MEDIUM WRITEUP
SumatraPDF <3.5.2 - Memory Corruption
SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, a heap out-of-bounds read vulnerability exists in SumatraPDF's MOBI HuffDic decompressor. The bounds check in AddCdicData() only validates half the range that DecodeOne() actually accesses. Opening a crafted .mobi file can read nearly (1 << codeLength) bytes beyond the CDIC dictionary buffer, leading to a crash.
CVSS 5.5
CVE-2025-48172 WRITEUP MEDIUM WRITEUP
CHMLib < 2bef8d06 - Heap-Based Buffer Overflow via Integer Overflow
CHMLib through 2bef8d0, as used in SumatraPDF and other products, has a chm_lib.c _chm_decompress_block integer overflow. There is a resultant heap-based buffer overflow in _chm_fetch_bytes.
CVSS 5.6