gnu: python-pillow: Fix CVE-2022-45199.

Fixes: <https://issues.guix.gnu.org/issue/61172>

* gnu/packages/python-xyz.scm (python-pillow/security-fixes): New variable.
(python-pillow): Add replacement.
* gnu/packages/patches/python-pillow-CVE-2022-45199.patch: New file.
* gnu/local.mk: Register it.

3 files changed, 42 insertions, 0 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index 2944211e12..1b922a9356 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1745,6 +1745,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/python-peachpy-determinism.patch	\
   %D%/packages/patches/python-pep8-stdlib-tokenize-compat.patch \
   %D%/packages/patches/python-piexif-fix-tests-with-pillow-7.2.patch	\
+  %D%/packages/patches/python-pillow-CVE-2022-45199.patch	\
   %D%/packages/patches/python-pyfakefs-remove-bad-test.patch	\
   %D%/packages/patches/python-pyflakes-test-location.patch	\
   %D%/packages/patches/python2-pyopenssl-openssl-compat.patch	\
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.
+
diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 7c8b3b3378..abe4862121 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -7676,6 +7676,7 @@ retrieve text and metadata from PDFs as well as merge entire files together.")
   (package
     (name "python-pillow")
     (version "9.2.0")
+    (replacement python-pillow/security-fixes)
     (source (origin
               (method url-fetch)
               (uri (pypi-uri "Pillow" version))
@@ -7723,6 +7724,10 @@ a general image processing tool.")
               "http://www.pythonware.com/products/pil/license.htm"
               "The PIL Software License"))))
 
+(define-public python-pillow/security-fixes
+  (package-with-patches python-pillow
+                        (search-patches "python-pillow-CVE-2022-45199.patch")))
+
 (define-public python-pillow-2.9
   (package
     (inherit python-pillow)