From patchwork Sun Mar 29 22:37:43 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoann Congal X-Patchwork-Id: 84755 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 9EEBBFC9815 for ; Sun, 29 Mar 2026 22:38:19 +0000 (UTC) Received: from mail-wr1-f50.google.com (mail-wr1-f50.google.com [209.85.221.50]) by mx.groups.io with SMTP id smtpd.msgproc01-g2.38624.1774823891483680086 for ; Sun, 29 Mar 2026 15:38:11 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@smile.fr header.s=google header.b=2IRo9TA0; spf=pass (domain: smile.fr, ip: 209.85.221.50, mailfrom: yoann.congal@smile.fr) Received: by mail-wr1-f50.google.com with SMTP id ffacd0b85a97d-43b949bf4easo2187360f8f.0 for ; Sun, 29 Mar 2026 15:38:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=smile.fr; s=google; t=1774823890; x=1775428690; darn=lists.openembedded.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=GZ363e0EVIi8MryHmDhiofnldkWTub/QYI8YZsUpARI=; b=2IRo9TA0FMqsdcjpX2OWcPF3GZ6uqjwJtjFNM6n4Mt3NoAKGsyCVtiW+aw9NTQ6tKQ nGQ9JdohHff1T6VaRFktZcimGKjjC+tWKr2Rq8AOMT9XMEzlbzNhSFO6AX8hEHtGAf3i +0bbuKeyu13/3XAm0Lnjnio+PkJL7mQ0XX5tA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774823890; x=1775428690; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=GZ363e0EVIi8MryHmDhiofnldkWTub/QYI8YZsUpARI=; b=PiG4PyEulpn7NnHw9VGfvdKuuKCbJsj+Nb/oDjRHW/J3ydL9LFMzGWWHv1YmLAqp/Z FRkLCAR17NgYI663UI3muf8nC2yQckeY3eLWYdZ9041plmTPoEoXO0bO9EcNySyivdKH zIgO+VOZlJoaf3csDpCIOWYcQjjsmmL3DOi3+ouddSd4pcWXKxhsC2Tg2dRJU4oWsxu2 rsyZblMZ8rm/QrhGGSSgHYKWxqycVMkdHjaobo9dE7Tbx/XvS0NBhkVqBRePhkCkq6VX F088I6ZQhKdkgKJmLzqU15THg4gXO3BXQeVgT4OyDS6VoB/9o8n5/9SI7Y2SAHuLrFhL AhKg== X-Gm-Message-State: AOJu0Yw1XsavM/YMCvvRNPRpkMs1aLmpj8QItoe8WCGMLMQaw/jdP18M Q+UkfrAigeg/ryOt7Un4nQvbRhDk823Z23/upBEEIsCE+J8oADvV97ME6Anunu9I9WjsW/07W7k Vl8e8sao= X-Gm-Gg: ATEYQzxFg2LBARr1MIZF+Ui2umEIHbHIukjieEd9APK7m0vRIq29Du6XlBOvXBFT4kR 05LlGPI0FlrbMOLXY8J8lO0bk8DuvnuThzE3Llg9s3/exJN88sNMezZuZy1n8XYuotfCwG177pp sFoax089ae6S7LTYLLQgxoMpMUC975PiXh3MbzkpIlxTHF98ZP44Kvh21gIKhFv31crWF/ueaNu qesjHT6HdNeEN6aPJm4gLByGu28j8qwy4jaJdUSDaqq6p7f9aWg86LphgymLRb8ULSeUWiRgQQ3 AEnpb2Aubq8Xco3fzJBqQfBBpS6PxkMt1iFwEIRs0p8BXsKkkGt/f6d/wrLJC35ve/ALI3GhS7N AsbKbZP1n6+ihu9ZA1O1KkDmMk1DW/2JNTeFp1DZqXlevREqnGOmxHeTN7z/JsTUWey+/BQbgPb QeuPJUCE0RnWP9sRNHaDdklh9yvxAgGgchDoSAYAFI3BTXBboj9/nvNFj9NPLzLOkMtBMisMpyb f3ksNcSJfLiGIav18vfuG6H/nU= X-Received: by 2002:a05:6000:1a89:b0:43b:9b9a:1bc with SMTP id ffacd0b85a97d-43b9ea9ac46mr17817176f8f.5.1774823889647; Sun, 29 Mar 2026 15:38:09 -0700 (PDT) Received: from FRSMI25-LASER.home (2a01cb001331aa00a2e4fb7b0d887544.ipv6.abo.wanadoo.fr. [2a01:cb00:1331:aa00:a2e4:fb7b:d88:7544]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43cf2471ee2sm13038542f8f.29.2026.03.29.15.38.09 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Mar 2026 15:38:09 -0700 (PDT) From: Yoann Congal To: openembedded-core@lists.openembedded.org Subject: [OE-core][scarthgap 11/16] python3-pyopenssl: Fix CVE-2026-27459 Date: Mon, 30 Mar 2026 00:37:43 +0200 Message-ID: X-Mailer: git-send-email 2.47.3 In-Reply-To: References: MIME-Version: 1.0 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 ; Sun, 29 Mar 2026 22:38:19 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/234169 From: Vijay Anusuri Pick patch mentioned in NVD [1] https://nvd.nist.gov/vuln/detail/CVE-2026-27459 [2] https://ubuntu.com/security/CVE-2026-27459 Signed-off-by: Vijay Anusuri Signed-off-by: Yoann Congal --- .../python3-pyopenssl/CVE-2026-27459.patch | 109 ++++++++++++++++++ .../python/python3-pyopenssl_24.0.0.bb | 1 + 2 files changed, 110 insertions(+) create mode 100644 meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27459.patch diff --git a/meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27459.patch b/meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27459.patch new file mode 100644 index 00000000000..f75540f96e0 --- /dev/null +++ b/meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27459.patch @@ -0,0 +1,109 @@ +From 57f09bb4bb051d3bc2a1abd36e9525313d5cd408 Mon Sep 17 00:00:00 2001 +From: Alex Gaynor +Date: Wed, 18 Feb 2026 07:46:15 -0500 +Subject: [PATCH] Fix buffer overflow in DTLS cookie generation callback + (#1479) + +The cookie generate callback copied user-returned bytes into a +fixed-size native buffer without enforcing a maximum length. A +callback returning more than DTLS1_COOKIE_LENGTH bytes would overflow +the OpenSSL-provided buffer, corrupting adjacent memory. + +Co-authored-by: Claude Opus 4.6 + +Upstream-Status: Backport [https://github.com/pyca/pyopenssl/commit/57f09bb4bb051d3bc2a1abd36e9525313d5cd408] +CVE: CVE-2026-27459 +Signed-off-by: Vijay Anusuri +--- + CHANGELOG.rst | 1 + + src/OpenSSL/SSL.py | 7 +++++++ + tests/test_ssl.py | 38 ++++++++++++++++++++++++++++++++++++++ + 3 files changed, 46 insertions(+) + +diff --git a/CHANGELOG.rst b/CHANGELOG.rst +index 12e60e4..6041fdc 100644 +--- a/CHANGELOG.rst ++++ b/CHANGELOG.rst +@@ -16,6 +16,7 @@ Deprecations: + Changes: + ^^^^^^^^ + ++- Properly raise an error if a DTLS cookie callback returned a cookie longer than ``DTLS1_COOKIE_LENGTH`` bytes. Previously this would result in a buffer-overflow. + - Added ``OpenSSL.SSL.Connection.get_selected_srtp_profile`` to determine which SRTP profile was negotiated. + `#1279 `_. + - ``Context.set_tlsext_servername_callback`` now handles exceptions raised in the callback by calling ``sys.excepthook`` and returning a fatal TLS alert. Previously, exceptions were silently swallowed and the handshake would proceed as if the callback had succeeded. +diff --git a/src/OpenSSL/SSL.py b/src/OpenSSL/SSL.py +index a6263c4..2e4da78 100644 +--- a/src/OpenSSL/SSL.py ++++ b/src/OpenSSL/SSL.py +@@ -691,11 +691,18 @@ class _CookieGenerateCallbackHelper(_CallbackExceptionHelper): + def __init__(self, callback): + _CallbackExceptionHelper.__init__(self) + ++ max_cookie_len = getattr(_lib, "DTLS1_COOKIE_LENGTH", 255) ++ + @wraps(callback) + def wrapper(ssl, out, outlen): + try: + conn = Connection._reverse_mapping[ssl] + cookie = callback(conn) ++ if len(cookie) > max_cookie_len: ++ raise ValueError( ++ f"Cookie too long (got {len(cookie)} bytes, " ++ f"max {max_cookie_len})" ++ ) + out[0 : len(cookie)] = cookie + outlen[0] = len(cookie) + return 1 +diff --git a/tests/test_ssl.py b/tests/test_ssl.py +index 55489b9..683e368 100644 +--- a/tests/test_ssl.py ++++ b/tests/test_ssl.py +@@ -4560,6 +4560,44 @@ class TestDTLS: + def test_it_works_with_srtp(self): + self._test_handshake_and_data(srtp_profile=b"SRTP_AES128_CM_SHA1_80") + ++ def test_cookie_generate_too_long(self) -> None: ++ s_ctx = Context(DTLS_METHOD) ++ ++ def generate_cookie(ssl: Connection) -> bytes: ++ return b"\x00" * 256 ++ ++ def verify_cookie(ssl: Connection, cookie: bytes) -> bool: ++ return True ++ ++ s_ctx.set_cookie_generate_callback(generate_cookie) ++ s_ctx.set_cookie_verify_callback(verify_cookie) ++ s_ctx.use_privatekey(load_privatekey(FILETYPE_PEM, server_key_pem)) ++ s_ctx.use_certificate(load_certificate(FILETYPE_PEM, server_cert_pem)) ++ s_ctx.set_options(OP_NO_QUERY_MTU) ++ s = Connection(s_ctx) ++ s.set_accept_state() ++ ++ c_ctx = Context(DTLS_METHOD) ++ c_ctx.set_options(OP_NO_QUERY_MTU) ++ c = Connection(c_ctx) ++ c.set_connect_state() ++ ++ c.set_ciphertext_mtu(1500) ++ s.set_ciphertext_mtu(1500) ++ ++ # Client sends ClientHello ++ try: ++ c.do_handshake() ++ except SSL.WantReadError: ++ pass ++ chunk = c.bio_read(self.LARGE_BUFFER) ++ s.bio_write(chunk) ++ ++ # Server tries DTLSv1_listen, which triggers cookie generation. ++ # The oversized cookie should raise ValueError. ++ with pytest.raises(ValueError, match="Cookie too long"): ++ s.DTLSv1_listen() ++ + def test_timeout(self, monkeypatch): + c_ctx = Context(DTLS_METHOD) + c = Connection(c_ctx) +-- +2.43.0 + diff --git a/meta/recipes-devtools/python/python3-pyopenssl_24.0.0.bb b/meta/recipes-devtools/python/python3-pyopenssl_24.0.0.bb index bc0b568a46a..94a70aa17d1 100644 --- a/meta/recipes-devtools/python/python3-pyopenssl_24.0.0.bb +++ b/meta/recipes-devtools/python/python3-pyopenssl_24.0.0.bb @@ -12,6 +12,7 @@ inherit pypi setuptools3 SRC_URI += " \ file://CVE-2026-27448.patch \ + file://CVE-2026-27459.patch \ " PACKAGES =+ "${PN}-tests"