Thanks for the report, now fixed at source git repo:
commit 7d3c1bea895d910907e2501fe9165e353eceabae
Author: Markus Kuhn <markus.k...@cl.cam.ac.uk>
Date: Mon Feb 15 18:27:47 2021 +0000
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
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) |
https://www.cl.cam.ac.uk/~mgk25/jbigkit/
Markus
--
Markus Kuhn, Computer Laboratory, University of Cambridge
http://www.cl.cam.ac.uk/~mgk25/ || CB3 0FD, Great Britain
