Merge tag 'v1.92.3' into develop

This is again a security update targeted at mitigating [CVE-2023-4863](https://cve.org/CVERecord?id=CVE-2023-4863).
It turns out that libwebp is bundled statically in Pillow wheels so we need to update this dependency instead of
libwebp package at the OS level.

Unlike what was advertised in 1.92.2 changelog this release also impacts PyPI wheels and Debian packages from matrix.org.

We encourage admins to upgrade as soon as possible.

- Pillow 10.0.1 is now mandatory because of libwebp CVE-2023-4863, since Pillow provides libwebp in the wheels. ([\matrix-org#16347](matrix-org#16347))

* Bump pillow from 10.0.0 to 10.0.1. ([\matrix-org#16344](matrix-org#16344))

CHANGES.md

@@ -1,3 +1,22 @@
+# Synapse 1.92.3 (2023-09-18)
+
+This is again a security update targeted at mitigating [CVE-2023-4863](https://cve.org/CVERecord?id=CVE-2023-4863).
+It turns out that libwebp is bundled statically in Pillow wheels so we need to update this dependency instead of
+libwebp package at the OS level.
+
+Unlike what was advertised in 1.92.2 changelog this release also impacts PyPI wheels and Debian packages from matrix.org.
+
+We encourage admins to upgrade as soon as possible.
+
+
+### Internal Changes
+
+- Pillow 10.0.1 is now mandatory because of libwebp CVE-2023-4863, since Pillow provides libwebp in the wheels. ([\#16347](https://github.com/matrix-org/synapse/issues/16347))
+
+### Updates to locked dependencies
+
+* Bump pillow from 10.0.0 to 10.0.1. ([\#16344](https://github.com/matrix-org/synapse/issues/16344))
+
 # Synapse 1.92.2 (2023-09-15)
 
 This is a Docker-only update to mitigate [CVE-2023-4863](https://cve.org/CVERecord?id=CVE-2023-4863), a critical vulnerability in `libwebp`. Server admins not using Docker should ensure that their `libwebp` is up to date (if installed). We encourage admins to upgrade as soon as possible.

debian/changelog

@@ -1,3 +1,9 @@
+matrix-synapse-py3 (1.92.3) stable; urgency=medium
+
+  * New Synapse release 1.92.3.
+
+ -- Synapse Packaging team <[email protected]>  Mon, 18 Sep 2023 15:05:04 +0200
+
 matrix-synapse-py3 (1.92.2) stable; urgency=medium
 
   * New Synapse release 1.92.2.

pyproject.toml

@@ -89,7 +89,7 @@ manifest-path = "rust/Cargo.toml"
 
 [tool.poetry]
 name = "matrix-synapse"
-version = "1.92.2"
+version = "1.92.3"
 description = "Homeserver for the Matrix decentralised comms protocol"
 authors = ["Matrix.org Team and Contributors <[email protected]>"]
 license = "Apache-2.0"
@@ -174,7 +174,9 @@ PyYAML = ">=3.13"
 pyasn1 = ">=0.1.9"
 pyasn1-modules = ">=0.0.7"
 bcrypt = ">=3.1.7"
-Pillow = ">=5.4.0"
+# 10.0.1 minimum is mandatory here because of libwebp CVE-2023-4863.
+# Packagers that already took care of libwebp can lower that down to 5.4.0.
+Pillow = ">=10.0.1"
 # We use SortedDict.peekitem(), which was added in sortedcontainers 1.5.2.
 sortedcontainers = ">=1.5.2"
 pymacaroons = ">=0.13.0"