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39 lines
1.1 KiB
Diff
39 lines
1.1 KiB
Diff
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Fix CVE-2016-8670 (buffer overflow in dynamicGetbuf()):
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8670
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http://seclists.org/oss-sec/2016/q4/138
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Patch copied from upstream source repository:
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https://github.com/libgd/libgd/commit/53110871935244816bbb9d131da0bccff734bfe9
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From 53110871935244816bbb9d131da0bccff734bfe9 Mon Sep 17 00:00:00 2001
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From: "Christoph M. Becker" <cmbecker69@gmx.de>
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Date: Wed, 12 Oct 2016 11:15:32 +0200
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Subject: [PATCH] Avoid potentially dangerous signed to unsigned conversion
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We make sure to never pass a negative `rlen` as size to memcpy(). See
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also <https://bugs.php.net/bug.php?id=73280>.
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Patch provided by Emmanuel Law.
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---
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src/gd_io_dp.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/gd_io_dp.c b/src/gd_io_dp.c
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index 135eda3..228bfa5 100644
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--- a/src/gd_io_dp.c
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+++ b/src/gd_io_dp.c
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@@ -276,7 +276,7 @@ static int dynamicGetbuf(gdIOCtxPtr ctx, void *buf, int len)
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if(remain >= len) {
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rlen = len;
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} else {
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- if(remain == 0) {
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+ if(remain <= 0) {
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/* 2.0.34: EOF is incorrect. We use 0 for
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* errors and EOF, just like fileGetbuf,
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* which is a simple fread() wrapper.
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--
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2.10.1
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