Check the document stream is seekable when opening it

Fixes bug 14126

1 files changed, 7 insertions, 0 deletions

diff --git a/poppler/PDFDoc.cc b/poppler/PDFDoc.cc
index c0c8f58c..b27fd7ca 100644
--- a/poppler/PDFDoc.cc
+++ b/poppler/PDFDoc.cc
@@ -181,6 +181,13 @@ PDFDoc::PDFDoc(BaseStream *strA, GooString *ownerPassword,
 }
 
 GBool PDFDoc::setup(GooString *ownerPassword, GooString *userPassword) {
+  str->setPos(0, -1);
+  if (str->getPos() <= 0)
+  {
+    error(-1, "Document base stream is not seekable");
+    return gFalse;
+  }
+
   str->reset();
 
   // check footer