It was found that the forceput operator could be extracted from the DefineResource method in ghostscript before 9.27. A specially crafted PostScript file could use this flaw in order to, for example, have access to the file system outside of the constrains imposed by -dSAFER.
{
"binaries": [
{
"binary_version": "9.26~dfsg+0-0ubuntu0.14.04.8",
"binary_name": "ghostscript"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.14.04.8",
"binary_name": "ghostscript-x"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.14.04.8",
"binary_name": "libgs-dev"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.14.04.8",
"binary_name": "libgs9"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.14.04.8",
"binary_name": "libgs9-common"
}
],
"availability": "No subscription required"
}
{
"binaries": [
{
"binary_version": "9.26~dfsg+0-0ubuntu0.16.04.8",
"binary_name": "ghostscript"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.16.04.8",
"binary_name": "ghostscript-x"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.16.04.8",
"binary_name": "libgs-dev"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.16.04.8",
"binary_name": "libgs9"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.16.04.8",
"binary_name": "libgs9-common"
}
],
"availability": "No subscription required"
}
{
"binaries": [
{
"binary_version": "9.26~dfsg+0-0ubuntu0.18.04.8",
"binary_name": "ghostscript"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.18.04.8",
"binary_name": "ghostscript-x"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.18.04.8",
"binary_name": "libgs-dev"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.18.04.8",
"binary_name": "libgs9"
},
{
"binary_version": "9.26~dfsg+0-0ubuntu0.18.04.8",
"binary_name": "libgs9-common"
}
],
"availability": "No subscription required"
}