An integer overflow in Exiv2 through 0.27.1 allows an attacker to cause a denial of service (SIGSEGV) via a crafted PNG image file, because PngImage::readMetadata mishandles a chunkLength - iccOffset subtraction.Referenceshttps://github.com/Exiv2/exiv2/issues/790https://github.com/Exiv2/exiv2/pull/795https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FGBT5OD2TF4AIXJUC56WOUJRHAZLZ4DC/
