1 files changed, 26 insertions, 0 deletions
diff --git a/p7zip/CVE-2017-17969.patch b/p7zip/CVE-2017-17969.patch
new file mode 100644
index 000000000..9a820af73
--- /dev/null
+++ b/p7zip/CVE-2017-17969.patch
@@ -0,0 +1,26 @@
+From: =?utf-8?q?Antoine_Beaupr=C3=A9?= <anarcat@debian.org>
+Date: Sun, 28 Jan 2018 21:19:50 +0100
+Subject: backport of the CVE-2017-17969 fix from 7zip 18.00-beta
+
+---
+ CPP/7zip/Compress/ShrinkDecoder.cpp | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/CPP/7zip/Compress/ShrinkDecoder.cpp b/CPP/7zip/Compress/ShrinkDecoder.cpp
+index 80b7e67..4acdce5 100644
+--- a/CPP/7zip/Compress/ShrinkDecoder.cpp
++++ b/CPP/7zip/Compress/ShrinkDecoder.cpp
+@@ -121,7 +121,12 @@ HRESULT CDecoder::CodeReal(ISequentialInStream *inStream, ISequentialOutStream *
+     {
+       _stack[i++] = _suffixes[cur];
+       cur = _parents[cur];
+-    }
++      if (i >= kNumItems)
++        break;
++     }
++
++    if (i >= kNumItems)
++      break;
+     
+     _stack[i++] = (Byte)cur;
+     lastChar2 = (Byte)cur;