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Handle cff fonts with erroneous stackSize

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This commit is contained in:
Jason O. Jensen 2017-03-06 19:17:27 -05:00
parent 754c4bd0ab
commit d230784ac3
4 changed files with 10 additions and 2 deletions
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5
src/core/cff_parser.js
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@ -475,7 +475,7 @@ var CFFParser = (function CFFParserClosure() {
parseCharString: function CFFParser_parseCharString(state, data, parseCharString: function CFFParser_parseCharString(state, data,
localSubrIndex, localSubrIndex,
globalSubrIndex) { globalSubrIndex) {
if (state.callDepth > MAX_SUBR_NESTING) { if (!data || state.callDepth > MAX_SUBR_NESTING) {
return false; return false;
} }
var stackSize = state.stackSize; var stackSize = state.stackSize;
@ -552,7 +552,8 @@ var CFFParser = (function CFFParserClosure() {
bias = 1131; bias = 1131;
} }
var subrNumber = stack[--stackSize] + bias; var subrNumber = stack[--stackSize] + bias;
if (subrNumber < 0 || subrNumber >= subrsIndex.count) { if (subrNumber < 0 || subrNumber >= subrsIndex.count ||
isNaN(subrNumber)) {
validationCommand = CharstringValidationData[value]; validationCommand = CharstringValidationData[value];
warn('Out of bounds subrIndex for ' + validationCommand.id); warn('Out of bounds subrIndex for ' + validationCommand.id);
return false; return false;

1
test/pdfs/.gitignore vendored
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@ -276,3 +276,4 @@
!operator-in-TJ-array.pdf !operator-in-TJ-array.pdf
!issue7878.pdf !issue7878.pdf
!font_ascent_descent.pdf !font_ascent_descent.pdf
!issue8097_reduced.pdf

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test/pdfs/issue8097_reduced.pdf Normal file
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6
test/test_manifest.json
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@ -3403,5 +3403,11 @@
"md5": "c0048a7735010002b998c112335e47bf", "md5": "c0048a7735010002b998c112335e47bf",
"rounds": 1, "rounds": 1,
"type": "eq" "type": "eq"
},
{ "id": "issue8097",
"file": "pdfs/issue8097_reduced.pdf",
"md5": "ced0e2d88cfd5b4d3a55d937ea288af1",
"rounds": 1,
"type": "eq"
} }
] ]