python-pillow/SOURCES/CVE-2021-28676.patch

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2021-11-09 09:45:46 +00:00
From cedb7ba568161021bc2f2f48af95fcf33e262f77 Mon Sep 17 00:00:00 2001
From: Lumir Balhar <lbalhar@redhat.com>
Date: Mon, 14 Jun 2021 09:30:01 +0200
Subject: [PATCH 4/5] CVE-2021-28676
---
src/libImaging/FliDecode.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/libImaging/FliDecode.c b/src/libImaging/FliDecode.c
index 72ba138..9181b8b 100644
--- a/src/libImaging/FliDecode.c
+++ b/src/libImaging/FliDecode.c
@@ -209,6 +209,11 @@ ImagingFliDecode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
return -1;
}
advance = I32(ptr);
+ if (advance == 0 ) {
+ // If there's no advance, we're in in infinite loop
+ state->errcode = IMAGING_CODEC_BROKEN;
+ return -1;
+ }
ptr += advance;
bytes -= advance;
}
--
2.31.1