guix/gnu/packages/patches/mcrypt-CVE-2012-4409.patch

From 4876e3a692739bb9ca00d0f500fd5f4b3eb16ce3 Mon Sep 17 00:00:00 2001
From: Tom Callaway <spot@fedoraproject.org>
Date: Fri, 7 Sep 2012 11:39:29 -0400
Subject: apply fix for CVE-2012-4409 (thanks to Raphael Geissert)

---
 mcrypt-CVE-2012-4409.patch | 12 ++++++++++++
 mcrypt.spec                | 10 +++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 mcrypt-CVE-2012-4409.patch

diff --git a/mcrypt-CVE-2012-4409.patch b/mcrypt-CVE-2012-4409.patch
new file mode 100644
index 0000000..747f428
--- /dev/null
+++ b/mcrypt-CVE-2012-4409.patch
@@ -0,0 +1,12 @@
+diff -up mcrypt-2.6.8/src/extra.c.CVE-2012-4409 mcrypt-2.6.8/src/extra.c
+--- mcrypt-2.6.8/src/extra.c.CVE-2012-4409	2012-09-07 11:00:55.906870746 -0400
++++ mcrypt-2.6.8/src/extra.c	2012-09-07 11:00:27.967858365 -0400
+@@ -242,6 +242,8 @@ int check_file_head(FILE * fstream, char
+ 			if (m_getbit(0, sflag) != 0) { /* if the first bit is set */
+ 				*salt_size = m_setbit(0, sflag, 0);
+ 				if (*salt_size > 0) {
++					if (*salt_size > sizeof(tmp_buf))
++						err_quit(_("Salt is too long\n"));
+ 					fread(tmp_buf, 1, *salt_size,
+ 					      fstream);
+ 					memmove(salt, tmp_buf, *salt_size);
 
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