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Fix CVE-2016-10087, a null pointer dereference in png_set_text_2():
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-10087
http://seclists.org/oss-sec/2016/q4/777
Patch adapted from upstream source repository:
https://sourceforge.net/p/libpng/code/ci/812768d7a9c973452222d454634496b25ed415eb/
From 812768d7a9c973452222d454634496b25ed415eb Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Thu, 29 Dec 2016 07:51:33 -0600
Subject: [PATCH] [libpng16] Fixed a potential null pointer dereference in
png_set_text_2()
(bug report and patch by Patrick Keshishian).
---
ANNOUNCE | 2 ++
CHANGES | 2 ++
png.c | 1 +
3 files changed, 5 insertions(+)
diff --git a/png.c b/png.c
index 8afc28fc2..2e05de159 100644
--- a/png.c
+++ b/png.c
@@ -477,6 +477,7 @@ png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask,
png_free(png_ptr, info_ptr->text);
info_ptr->text = NULL;
info_ptr->num_text = 0;
+ info_ptr->max_text = 0;
}
}
#endif
--
2.11.0
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