ALAS2023-2025-1306

References: CVE-2025-64505  CVE-2025-64506  CVE-2025-64720  CVE-2025-65018 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

A heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of-bounds memory access. (CVE-2025-64505)

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, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51. (CVE-2025-64506)

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 x 257 required by the simplified PNG API. This issue has been patched in version 1.6.51. (CVE-2025-64720)

Heap buffer overflow in the libpng simplified API function png_image_finish_read when processing 16-bit interlaced PNGs with 8-bit output format. Attacker-crafted interlaced PNG files cause heap writes beyond allocated buffer bounds. (CVE-2025-65018)

Issue Correction:
Run dnf update libpng --releasever 2023.9.20251208 or dnf update --advisory ALAS2023-2025-1306 --releasever 2023.9.20251208 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation

New Packages:

aarch64:
    libpng-debugsource-1.6.37-10.amzn2023.0.7.aarch64
    libpng-devel-1.6.37-10.amzn2023.0.7.aarch64
    libpng-devel-debuginfo-1.6.37-10.amzn2023.0.7.aarch64
    libpng-tools-1.6.37-10.amzn2023.0.7.aarch64
    libpng-1.6.37-10.amzn2023.0.7.aarch64
    libpng-static-1.6.37-10.amzn2023.0.7.aarch64
    libpng-tools-debuginfo-1.6.37-10.amzn2023.0.7.aarch64
    libpng-debuginfo-1.6.37-10.amzn2023.0.7.aarch64

src:
    libpng-1.6.37-10.amzn2023.0.7.src

x86_64:
    libpng-debugsource-1.6.37-10.amzn2023.0.7.x86_64
    libpng-devel-debuginfo-1.6.37-10.amzn2023.0.7.x86_64
    libpng-tools-1.6.37-10.amzn2023.0.7.x86_64
    libpng-tools-debuginfo-1.6.37-10.amzn2023.0.7.x86_64
    libpng-1.6.37-10.amzn2023.0.7.x86_64
    libpng-devel-1.6.37-10.amzn2023.0.7.x86_64
    libpng-debuginfo-1.6.37-10.amzn2023.0.7.x86_64
    libpng-static-1.6.37-10.amzn2023.0.7.x86_64