![André Hentschel](/assets/img/avatar_default.png)
Signed-off-by: André Hentschel <nerv@dawncrow.de> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
From: =?utf-8?q?Antoine_Beaupr=C3=A9?= <anarcat@debian.org>
|
|
Date: Fri, 2 Feb 2018 11:11:41 +0100
|
|
Subject: Heap-based buffer overflow in 7zip/Compress/ShrinkDecoder.cpp
|
|
|
|
Origin: vendor, https://sourceforge.net/p/p7zip/bugs/_discuss/thread/0920f369/27d7/attachment/CVE-2017-17969.patch
|
|
Forwarded: https://sourceforge.net/p/p7zip/bugs/_discuss/thread/0920f369/#27d7
|
|
Bug: https://sourceforge.net/p/p7zip/bugs/204/
|
|
Bug-Debian: https://bugs.debian.org/888297
|
|
Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2017-17969
|
|
Reviewed-by: Salvatore Bonaccorso <carnil@debian.org>
|
|
Last-Update: 2018-02-01
|
|
Applied-Upstream: 18.00-beta
|
|
|
|
Signed-off-by: André Hentschel <nerv@dawncrow.de>
|
|
---
|
|
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..ca37764 100644
|
|
--- a/CPP/7zip/Compress/ShrinkDecoder.cpp
|
|
+++ b/CPP/7zip/Compress/ShrinkDecoder.cpp
|
|
@@ -121,8 +121,13 @@ 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;
|
|
|