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Handle corrupt ASCII85Decode inline images with truncated EOD markers (issue 11385)

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In the PDF document in question, there's an ASCII85Decode inline image where the '>' part of EOD (end-of-data) marker is missing; hence the PDF document is corrupt.
This commit is contained in:
Jonas Jenwald 2019-12-05 15:44:51 +01:00
parent 514b500a6c
commit 5c0336872e
3 changed files with 19 additions and 0 deletions
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10
src/core/parser.js
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@ -344,6 +344,8 @@ class Parser {
let startPos = stream.pos, ch, length;
while ((ch = stream.getByte()) !== -1) {
if (ch === TILDE) {
const tildePos = stream.pos;
ch = stream.peekByte();
// Handle corrupt PDF documents which contains whitespace "inside" of
// the EOD marker (fixes issue10614.pdf).
@ -355,6 +357,14 @@ class Parser {
stream.skip();
break;
}
// Handle corrupt PDF documents which contains truncated EOD markers,
// where the '>' character is missing (fixes issue11385.pdf).
if (stream.pos > tildePos) {
const maybeEI = stream.peekBytes(2);
if (maybeEI[0] === /* E = */ 0x45 && maybeEI[1] === /* I = */ 0x49) {
break;
}
}
}
}
length = stream.pos - startPos;