1 files changed, 31 insertions, 0 deletions

diff --git a/meta-oe/recipes-extended/p7zip/files/CVE-2017-17969.patch b/meta-oe/recipes-extended/p7zip/files/CVE-2017-17969.patch
new file mode 100644
index 000000000..177d1455f
--- /dev/null
+++ b/meta-oe/recipes-extended/p7zip/files/CVE-2017-17969.patch
@@ -0,0 +1,31 @@
+p7zip: Fix CVE-2017-17969
+
+[No upstream tracking] -- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=888297
+
+Heap-based buffer overflow in 7zip
+
+Compress/ShrinkDecoder.cpp: Heap-based buffer overflow
+in the NCompress::NShrink::CDecoder::CodeReal method
+in 7-Zip before 18.00 and p7zip allows remote attackers
+to cause a denial of service (out-of-bounds write)
+or potentially execute arbitrary code via a crafted ZIP archive. 
+
+Upstream-Status: Backport [https://sourceforge.net/p/p7zip/bugs/_discuss/thread/0920f369/8316/attachment/CVE-2017-17969.patch]
+CVE: CVE-2017-17969
+Signed-off-by: Radovan Scasny <radovan.scasny@siemens.com>
+
+--- 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 (cur >= kNumItems || i >= kNumItems)
++               break;
+     }
++       
++       if (cur >= kNumItems || i >= kNumItems)
++               break;
+     
+     _stack[i++] = (Byte)cur;
+     lastChar2 = (Byte)cur;