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.Referenceshttps://access.redhat.com/errata/RHSA-2018:3007https://security.netapp.com/advisory/ntap-20181018-0001/https://access.redhat.com/errata/RHSA-2018:3779https://access.redhat.com/errata/RHSA-2018:3534https://access.redhat.com/errata/RHSA-2018:3003https://usn.ubuntu.com/3712-1/https://access.redhat.com/errata/RHSA-2018:3002https://sourceforge.net/p/libpng/bugs/278/https://access.redhat.com/errata/RHSA-2018:3671https://access.redhat.com/errata/RHSA-2018:3852https://access.redhat.com/errata/RHSA-2018:3008http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlhttps://access.redhat.com/errata/RHSA-2018:3533https://access.redhat.com/errata/RHSA-2018:3001https://access.redhat.com/errata/RHSA-2018:3000http://www.securityfocus.com/bid/105599http://www.securitytracker.com/id/1041889https://access.redhat.com/errata/RHSA-2018:3672https://github.com/glennrp/libpng/commit/8a05766cb74af05c04c53e6c9d60c13fc4d59bf2https://security.gentoo.org/glsa/201908-10
