From patchwork Thu Jan 1 18:43:12 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Marko X-Patchwork-Id: 77911 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id D2DCAEEE245 for ; Thu, 1 Jan 2026 18:43:26 +0000 (UTC) Received: from mta-65-228.siemens.flowmailer.net (mta-65-228.siemens.flowmailer.net [185.136.65.228]) by mx.groups.io with SMTP id smtpd.msgproc01-g2.4248.1767292998813549456 for ; Thu, 01 Jan 2026 10:43:20 -0800 Authentication-Results: mx.groups.io; dkim=pass header.i=peter.marko@siemens.com header.s=fm1 header.b=QyowRfSr; spf=pass (domain: rts-flowmailer.siemens.com, ip: 185.136.65.228, mailfrom: fm-256628-20260101184315e09801e5420002070e-3gdibi@rts-flowmailer.siemens.com) Received: by mta-65-228.siemens.flowmailer.net with ESMTPSA id 20260101184315e09801e5420002070e for ; Thu, 01 Jan 2026 19:43:16 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; s=fm1; d=siemens.com; i=peter.marko@siemens.com; h=Date:From:Subject:To:Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding:Cc; bh=tQD1YE/ds5R55x67e2TRnWG3j3OQlfDHpfbJbQN9kUg=; b=QyowRfSrkpCQ5FOMDgt3bqHJqYdyqCpAvzvbWQdFstw9hO5YtH0sA++26Ohzg/CQWIbUk7 nCNLhhnKStULGUuv3qTkwbOHKbn581kFh8sWUAoieFhcPs9e8Q55Nh7nKJ6T1uvaub39Kllm 8YyRVu9NxODNJL9OLkQuMdap10VmCe/Ah0NnsiztL0YN6Uybb1rYEDBCZHDRMEnlOhwzxwwX JxlkO79cAAdfS6zKv/OqWi6IWfQY59QVd+JhzKcTurYPpDbRphEDKbxFkW2TWCWyP9+7DS/w j4oz6/X04TSMWaK1vSIHP7SPWIfPxZ8UBQsj5BJ2+qYVvIS0K4WP2/0Q==; From: Peter Marko To: openembedded-core@lists.openembedded.org Cc: Peter Marko Subject: [OE-core][kirkstone][PATCH] python3-urllib3: patch CVE-2025-66418 Date: Thu, 1 Jan 2026 19:43:12 +0100 Message-Id: <20260101184312.94662-1-peter.marko@siemens.com> MIME-Version: 1.0 X-Flowmailer-Platform: Siemens Feedback-ID: 519:519-256628:519-21489:flowmailer List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Thu, 01 Jan 2026 18:43:26 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/228827 From: Peter Marko Pick patch per [1]. [1] https://nvd.nist.gov/vuln/detail/CVE-2025-66418 Signed-off-by: Peter Marko --- .../python3-urllib3/CVE-2025-66418.patch | 70 +++++++++++++++++++ .../python/python3-urllib3_1.26.20.bb | 1 + 2 files changed, 71 insertions(+) create mode 100644 meta/recipes-devtools/python/python3-urllib3/CVE-2025-66418.patch diff --git a/meta/recipes-devtools/python/python3-urllib3/CVE-2025-66418.patch b/meta/recipes-devtools/python/python3-urllib3/CVE-2025-66418.patch new file mode 100644 index 00000000000..67479010e67 --- /dev/null +++ b/meta/recipes-devtools/python/python3-urllib3/CVE-2025-66418.patch @@ -0,0 +1,70 @@ +From 24d7b67eac89f94e11003424bcf0d8f7b72222a8 Mon Sep 17 00:00:00 2001 +From: Illia Volochii +Date: Fri, 5 Dec 2025 16:41:33 +0200 +Subject: [PATCH] Merge commit from fork + +* Add a hard-coded limit for the decompression chain + +* Reuse new list +--- + changelog/GHSA-gm62-xv2j-4w53.security.rst | 4 ++++ + src/urllib3/response.py | 12 +++++++++++- + test/test_response.py | 10 ++++++++++ + 3 files changed, 25 insertions(+), 1 deletion(-) + create mode 100644 changelog/GHSA-gm62-xv2j-4w53.security.rst + +diff --git a/changelog/GHSA-gm62-xv2j-4w53.security.rst b/changelog/GHSA-gm62-xv2j-4w53.security.rst +new file mode 100644 +index 00000000..6646eaa3 +--- /dev/null ++++ b/changelog/GHSA-gm62-xv2j-4w53.security.rst +@@ -0,0 +1,4 @@ ++Fixed a security issue where an attacker could compose an HTTP response with ++virtually unlimited links in the ``Content-Encoding`` header, potentially ++leading to a denial of service (DoS) attack by exhausting system resources ++during decoding. The number of allowed chained encodings is now limited to 5. +diff --git a/src/urllib3/response.py b/src/urllib3/response.py +index 4ba42136..069f726c 100644 +--- a/src/urllib3/response.py ++++ b/src/urllib3/response.py +@@ -135,8 +135,18 @@ class MultiDecoder(object): + they were applied. + """ + ++ # Maximum allowed number of chained HTTP encodings in the ++ # Content-Encoding header. ++ max_decode_links = 5 ++ + def __init__(self, modes): +- self._decoders = [_get_decoder(m.strip()) for m in modes.split(",")] ++ encodings = [m.strip() for m in modes.split(",")] ++ if len(encodings) > self.max_decode_links: ++ raise DecodeError( ++ "Too many content encodings in the chain: " ++ f"{len(encodings)} > {self.max_decode_links}" ++ ) ++ self._decoders = [_get_decoder(e) for e in encodings] + + def flush(self): + return self._decoders[0].flush() +diff --git a/test/test_response.py b/test/test_response.py +index 9592fdd9..d824ae70 100644 +--- a/test/test_response.py ++++ b/test/test_response.py +@@ -295,6 +295,16 @@ class TestResponse(object): + + assert r.data == b"foo" + ++ def test_read_multi_decoding_too_many_links(self) -> None: ++ fp = BytesIO(b"foo") ++ with pytest.raises( ++ DecodeError, match="Too many content encodings in the chain: 6 > 5" ++ ): ++ HTTPResponse( ++ fp, ++ headers={"content-encoding": "gzip, deflate, br, zstd, gzip, deflate"}, ++ ) ++ + def test_body_blob(self): + resp = HTTPResponse(b"foo") + assert resp.data == b"foo" diff --git a/meta/recipes-devtools/python/python3-urllib3_1.26.20.bb b/meta/recipes-devtools/python/python3-urllib3_1.26.20.bb index 58988e42055..1f1132d5b5d 100644 --- a/meta/recipes-devtools/python/python3-urllib3_1.26.20.bb +++ b/meta/recipes-devtools/python/python3-urllib3_1.26.20.bb @@ -9,6 +9,7 @@ inherit pypi setuptools3 SRC_URI += " \ file://CVE-2025-50181.patch \ + file://CVE-2025-66418.patch \ " RDEPENDS:${PN} += "\