From 08438a5098f3bb1de23a29334af55eba663f75bd Mon Sep 17 00:00:00 2001 From: "Eric S. Raymond" Date: Sat, 9 Feb 2019 10:52:21 -0500 Subject: [PATCH] Address SF bug #113: Heap Buffer Overflow-2 in function DGifDecompressLine()... This was CVE-2018-11490 [Retrieved from: https://sourceforge.net/p/giflib/code/ci/08438a5098f3bb1de23a29334af55eba663f75bd] Signed-off-by: Fabrice Fontaine --- lib/dgif_lib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/dgif_lib.c b/lib/dgif_lib.c index 15c1460..c4aee5f 100644 --- a/lib/dgif_lib.c +++ b/lib/dgif_lib.c @@ -930,7 +930,7 @@ DGifDecompressLine(GifFileType *GifFile, GifPixelType *Line, int LineLen) while (StackPtr != 0 && i < LineLen) Line[i++] = Stack[--StackPtr]; } - if (LastCode != NO_SUCH_CODE && Prefix[Private->RunningCode - 2] == NO_SUCH_CODE) { + if (LastCode != NO_SUCH_CODE && Private->RunningCode - 2 < LZ_MAX_CODE && Prefix[Private->RunningCode - 2] == NO_SUCH_CODE) { Prefix[Private->RunningCode - 2] = LastCode; if (CrntCode == Private->RunningCode - 2) { -- 2.20.1