From patchwork Tue Jan 20 13:52:43 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Marko, Peter" X-Patchwork-Id: 79214 X-Patchwork-Delegate: yoann.congal@smile.fr 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 078C9D2ECE9 for ; Tue, 20 Jan 2026 13:52:57 +0000 (UTC) Received: from mta-64-228.siemens.flowmailer.net (mta-64-228.siemens.flowmailer.net [185.136.64.228]) by mx.groups.io with SMTP id smtpd.msgproc01-g2.6773.1768917169126081871 for ; Tue, 20 Jan 2026 05:52:50 -0800 Authentication-Results: mx.groups.io; dkim=pass header.i=peter.marko@siemens.com header.s=fm1 header.b=DjN+Yf00; spf=pass (domain: rts-flowmailer.siemens.com, ip: 185.136.64.228, mailfrom: fm-256628-202601201352461adbb9b22f000207e0-6c8hhj@rts-flowmailer.siemens.com) Received: by mta-64-228.siemens.flowmailer.net with ESMTPSA id 202601201352461adbb9b22f000207e0 for ; Tue, 20 Jan 2026 14:52:46 +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=5WDdrhr4rkPhxIFDRN2Qj9/nOm6ndbuytNlwqWfsWV8=; b=DjN+Yf00Jk1pJGf3az9c9bpeLHxqH9J/+WXwKbypIfQ/Ex6ppQWaXINY2rznkFrTgw68NG UVVv8JXCEFCe+6JHq7uUXM9cTZgicG4FShkTnmS6Hl5iIiJnlqDanaylCTAEX81J7r7wG0Uc Bjfryh4t4jUmawpYDcHTdHCClUlk31s0UzzoxmqNBar4rcpYpdmR13eUVQTsXL50DMfxPmrk MdxAgJaDMD2eW2En4ALtiOHRcDXBrYH6CU9n8xWwhkxSlo6EGQgN3J1KfK8afCotj95VtxvU ZeJgrXnzg7j2xK3J1BskPSqfQn/oiqZprIqap1tiXxCEWfIVX8isX+Rw==; From: Peter Marko To: openembedded-core@lists.openembedded.org Cc: Peter Marko Subject: [OE-core][kirkstone][PATCH v2] python3-urllib3: patch CVE-2025-66418 Date: Tue, 20 Jan 2026 14:52:43 +0100 Message-Id: <20260120135243.2125879-1-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 ; Tue, 20 Jan 2026 13:52:56 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/229735 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 | 74 +++++++++++++++++++ .../python/python3-urllib3_1.26.20.bb | 1 + 2 files changed, 75 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..b490019d877 --- /dev/null +++ b/meta/recipes-devtools/python/python3-urllib3/CVE-2025-66418.patch @@ -0,0 +1,74 @@ +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 + +CVE: CVE-2025-66418 +Upstream-Status: Backport [https://github.com/urllib3/urllib3/commit/24d7b67eac89f94e11003424bcf0d8f7b72222a8] +Signed-off-by: Peter Marko +--- + 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} += "\