libpng 1.6.0-1.6.50 - Out-of-bounds Read in Palette Image Compositing
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2025-64720. PoCs published by dantsco.
AI-analyzed exploit summary This repository contains a working proof-of-concept exploit for CVE-2025-64720, a buffer overflow vulnerability in libpng's palette premultiplication logic. The PoC includes a Python script to generate malicious PNG files and a C program to trigger the vulnerability using the simplified PNG API.
Description
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, an out-of-bounds read vulnerability exists in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. The palette compositing code in png_init_read_transformations incorrectly applies background compositing during premultiplication, violating the invariant component ≤ alpha × 257 required by the simplified PNG API. This issue has been patched in version 1.6.51.
Exploits (1)
This repository contains a working proof-of-concept exploit for CVE-2025-64720, a buffer overflow vulnerability in libpng's palette premultiplication logic. The PoC includes a Python script to generate malicious PNG files and a C program to trigger the vulnerability using the simplified PNG API.
References (4)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H