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From 7d3c1bea895d910907e2501fe9165e353eceabae Mon Sep 17 00:00:00 2001
From: Markus Kuhn <Markus.Kuhn@cl.cam.ac.uk>
Date: Mon, 15 Feb 2021 18:27:47 +0000
Subject: [PATCH 15/15] jbg_newlen(): check for end-of-file within
MARKER_NEWLEN
fixes https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=969593
reported by Casper Sun
---
libjbig/jbig.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libjbig/jbig.c b/libjbig/jbig.c
index e9938e5..289b6d8 100644
--- a/libjbig/jbig.c
+++ b/libjbig/jbig.c
@@ -3272,6 +3272,8 @@ int jbg_newlen(unsigned char *bie, size_t len)
else if (p[0] == MARKER_ESC)
switch (p[1]) {
case MARKER_NEWLEN:
+ if (p + 5 >= bie + len)
+ return JBG_EAGAIN;
y = (((long) bie[ 8] << 24) | ((long) bie[ 9] << 16) |
((long) bie[10] << 8) | (long) bie[11]);
yn = (((long) p[2] << 24) | ((long) p[3] << 16) |
--
2.45.0
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