43 lines
1.5 KiB
Diff
43 lines
1.5 KiB
Diff
From 5e411a99604ff6be5db9e273ee84737204113299 Mon Sep 17 00:00:00 2001
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Message-Id: <5e411a99604ff6be5db9e273ee84737204113299.1518615489.git.mjg@fedoraproject.org>
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From: Sebastian Rasmussen <sebras@gmail.com>
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Date: Tue, 30 Jan 2018 02:05:57 +0100
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Subject: [PATCH] Bug 698916: Indirect object numbers must be in range.
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---
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source/pdf/pdf-parse.c | 2 ++
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source/pdf/pdf-xref.c | 4 ++--
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2 files changed, 4 insertions(+), 2 deletions(-)
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diff --git a/source/pdf/pdf-parse.c b/source/pdf/pdf-parse.c
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index 7904ebd7..b4783ae8 100644
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--- a/source/pdf/pdf-parse.c
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+++ b/source/pdf/pdf-parse.c
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@@ -623,6 +623,8 @@ pdf_parse_ind_obj(fz_context *ctx, pdf_document *doc,
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fz_throw(ctx, FZ_ERROR_SYNTAX, "expected object number");
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}
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num = buf->i;
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+ if (num < 0 || num > PDF_MAX_OBJECT_NUMBER)
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+ fz_throw(ctx, FZ_ERROR_SYNTAX, "object number out of range");
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tok = pdf_lex(ctx, file, buf);
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if (tok != PDF_TOK_INT)
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diff --git a/source/pdf/pdf-xref.c b/source/pdf/pdf-xref.c
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index 4997ebe5..cfcd0a21 100644
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--- a/source/pdf/pdf-xref.c
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+++ b/source/pdf/pdf-xref.c
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@@ -228,8 +228,8 @@ pdf_xref_entry *pdf_get_populating_xref_entry(fz_context *ctx, pdf_document *doc
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}
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/* Prevent accidental heap underflow */
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- if (num < 0)
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- fz_throw(ctx, FZ_ERROR_GENERIC, "object number must not be negative (%d)", num);
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+ if (num < 0 || num > PDF_MAX_OBJECT_NUMBER)
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+ fz_throw(ctx, FZ_ERROR_GENERIC, "object number out of range (%d)", num);
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/* Return the pointer to the entry in the last section. */
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xref = &doc->xref_sections[doc->num_xref_sections-1];
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--
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2.16.1.312.g365a692731
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