1 files changed, 36 insertions, 0 deletions
diff --git a/gnu/packages/patches/python-pillow-CVE-2022-45199.patch b/gnu/packages/patches/python-pillow-CVE-2022-45199.patch
new file mode 100644
index 0000000000..3b01d3a8f4
--- /dev/null
+++ b/gnu/packages/patches/python-pillow-CVE-2022-45199.patch
@@ -0,0 +1,36 @@
+From 13f2c5ae14901c89c38f898496102afd9daeaf6d Mon Sep 17 00:00:00 2001
+From: Eric Soroos <eric-github@soroos.net>
+Date: Fri, 28 Oct 2022 14:11:25 +0200
+Subject: [PATCH 1/5] Prevent DOS with large SAMPLESPERPIXEL in Tiff IFD
+
+A large value in the SAMPLESPERPIXEL tag could lead to a memory and
+runtime DOS in TiffImagePlugin.py when setting up the context for
+image decoding.
+
+diff --git a/src/PIL/TiffImagePlugin.py b/src/PIL/TiffImagePlugin.py
+index 04a63bd2b44..46166fc6335 100644
+--- a/src/PIL/TiffImagePlugin.py
++++ b/src/PIL/TiffImagePlugin.py
+@@ -257,6 +257,8 @@
+     (MM, 8, (1,), 1, (8, 8, 8), ()): ("LAB", "LAB"),
+ }
+ 
++MAX_SAMPLESPERPIXEL = max(len(key_tp[4]) for key_tp in OPEN_INFO.keys())
++
+ PREFIXES = [
+     b"MM\x00\x2A",  # Valid TIFF header with big-endian byte order
+     b"II\x2A\x00",  # Valid TIFF header with little-endian byte order
+@@ -1396,6 +1398,12 @@ def _setup(self):
+             SAMPLESPERPIXEL,
+             3 if self._compression == "tiff_jpeg" and photo in (2, 6) else 1,
+         )
++
++        if samples_per_pixel > MAX_SAMPLESPERPIXEL:
++            # DOS check, samples_per_pixel can be a Long, and we extend the tuple below
++            logger.error("More samples per pixel than can be decoded: %s", samples_per_pixel)
++            raise SyntaxError("Invalid value for samples per pixel")
++
+         if samples_per_pixel < bps_actual_count:
+             # If a file has more values in bps_tuple than expected,
+             # remove the excess.
+