CVE-2018-13785

In libpng 1.6.34, a wrong calculation of row_factor in the png_check_chunk_length function (pngrutil.c) may trigger an integer overflow and resultant divide-by-zero while processing a crafted PNG file, leading to a denial of service.

medium 6.5 CVSS 3.1
Published: Jul 9, 2018
Modified: May 29, 2026
Vendor: Libpng
Product: Libpng
Versions: 1.6.34,14.04,16.04,17.10,18.04,1.6.0,1.7.0,1.8.0,11.0.0,6.0

Description

In libpng 1.6.34, a wrong calculation of row_factor in the png_check_chunk_length function (pngrutil.c) may trigger an integer overflow and resultant divide-by-zero while processing a crafted PNG file, leading to a denial of service.

References

Related CVEs

CVE-2019-7317 medium · 5.3
png_image_free in png.c in libpng 1.6.x before 1.6.37 has a use-after-free because png_image_free_function is called under png_safe_execute.
CVE-2019-6129 medium · 6.5
png_create_info_struct in png.c in libpng 1.6.36 has a memory leak, as demonstrated by pngcp. NOTE: a third party has stated "I don't think it is libpng's job to free this buffer.