From patchwork Fri Mar 6 14:00:01 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Tondo X-Patchwork-Id: 82698 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 E984AF51406 for ; Fri, 6 Mar 2026 14:00:18 +0000 (UTC) Received: from mail-wm1-f46.google.com (mail-wm1-f46.google.com [209.85.128.46]) by mx.groups.io with SMTP id smtpd.msgproc02-g2.69539.1772805617894774723 for ; Fri, 06 Mar 2026 06:00:18 -0800 Authentication-Results: mx.groups.io; dkim=pass header.i=@gmail.com header.s=20230601 header.b=InpUvH9Q; spf=pass (domain: gmail.com, ip: 209.85.128.46, mailfrom: stondo@gmail.com) Received: by mail-wm1-f46.google.com with SMTP id 5b1f17b1804b1-4836e3288cdso62820535e9.0 for ; Fri, 06 Mar 2026 06:00:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1772805616; x=1773410416; darn=lists.openembedded.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=OSwz6Q0bosfSFNMXUEKBdXHqAunYPQFf0+puT9za7no=; b=InpUvH9Q80HdyES1sfRGq6dn6mlmhGNojo2A5meXwjcBBSPIRhDz4J3dzIhJ7lmnhN c9Gt9H7uiDbAxaP6pVv1JR9zoRhurGaicZMPaP7+8HWr+SA1G3g4549Y344swhQa7JLZ g91Tho5uxJlc9rakLRZ3Rvf1sVjPf2bKpCQpYklqZuBHe0xVIGGVjVArZxvsoE+Ba/Al oaS6P39GG3sCpVP3Q3HdJbXAlfwDLAhFkVQX75TrfK4ctkXontoR7uqVVuzTeXQImq/R PMfr1ApN1uU2jMKYEB4vHpTAeqVeCv9aMygFd7YiAXDJrEBk6wtzae864/s4VBPjt3ap jfLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772805616; x=1773410416; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=OSwz6Q0bosfSFNMXUEKBdXHqAunYPQFf0+puT9za7no=; b=QawD2IXdSKjx9KhgfOHKWEbyhfdkrcAiz/uggZ5fkgh6pH8ddXdAZV2owto46PMLqV oOgf1wI/FZpAC4epJGwfJUBw9YA9WIRSC4yDDxfv8DWdaYHhg6uu8VhBixEp11w1ZmRf 8y3gfX1xZ2hepbp3a3b9pdDm2drczwY2gI7lg1MwA3V5dRg5vB0yVh9qZR0GYPTvY41R 3s8BNtc9/mPE6fADiszb2h+WO6D916D7Fl8HIiRBuipoe8IM0KWqLYkeCAFlTWHvQNTX E3s4v6LZnC6R/DGyQ+c5mFtJEb5SaDuyHju+riIiI+glNwr+R1RRb81ZFIuDiLZwrTCz 2AKg== X-Gm-Message-State: AOJu0Yyl2DheWzKqYBiwTzczjZvVMVp3NVDsUZO9HCDdAMLlBI06Jimm tXwr7PxqJ/guIqiNSQElWXGkBrETxDSuI/7xqpb1+krcrMT/PheWpcXoQ2k4zw== X-Gm-Gg: ATEYQzwqdS/0cmaDS7gy45nIcqNZdE9yVfhFBdBkmeV6944WH7YmBRjdnefj+ngzzKA WZ2RptdcdUr+NNgEw9bFpLTJUoaMYKxCpOZcrX7f4cUzjs0QVL2sMqsjMCE1vN0RBKOdbHoLbTX hRmBHidz0zijVTjev5ZbLiMIm36c0dJXvE1Xn0FrD5eGZKUgwyTjxYXwPXelYjK3JsEucyS7n0W zQ1KF1DSeLC5DyeFDlzLfR6pg5vdXeUQasv3/tmBiWLrPnmqudngWd5RRTlVS3Fm7EEbI7EvErE ThLzmIlhtxJEppS4QRZmZ0I5GV9IOrwqfeF7/lnFm6p7/IwsoeKXj2I1VSYjzAv0Oe6Bdz5EhxZ eOo/iHO1vSCVw3C/ZkijFgrGuL7lhgSEwcawQapbzSMTp8zKvRb5YxG43wPa8r/IdpJ4nlckKD4 /siiJAFoeoZL1JRJxV3gXcOQ7Rsy2LhHRHkcIHGW06UAaEgsfz/cyg X-Received: by 2002:a05:600c:64c7:b0:47e:e59c:67c5 with SMTP id 5b1f17b1804b1-4852671d9c3mr32266265e9.8.1772805615646; Fri, 06 Mar 2026 06:00:15 -0800 (PST) Received: from fedora ([81.6.40.67]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4851fb4257csm187098845e9.15.2026.03.06.06.00.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Mar 2026 06:00:14 -0800 (PST) From: Stefano Tondo X-Google-Original-From: Stefano Tondo To: openembedded-core@lists.openembedded.org Cc: mathieu.dubois-briand@bootlin.com, joshua.watt@garmin.com, ross.burton@arm.com, adrian.freihofer@siemens.com, Peter.Marko@siemens.com, Stefano Tondo Subject: [OE-core][PATCH v7 09/10] cve_check: Escape special characters in CPE 2.3 formatted strings Date: Fri, 6 Mar 2026 15:00:01 +0100 Message-ID: X-Mailer: git-send-email 2.53.0 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 ; Fri, 06 Mar 2026 14:00:18 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/232575 CPE 2.3 formatted string binding (cpe:2.3:...) requires backslash escaping for special meta-characters according to NISTIR 7695. Characters like '++' and ':' in product names must be properly escaped to pass SBOM validation. The CPE 2.3 specification defines two bindings: - URI binding (cpe:/...) uses percent-encoding - Formatted string binding (cpe:2.3:...) uses backslash escaping This patch implements the formatted string binding properly by escaping only the required meta-characters with backslash: - Backslash (\) -> \\ - Question mark (?) -> \? - Asterisk (*) -> \* - Colon (:) -> \: - Plus (+) -> \+ (required by some SBOM validators) All other characters including -, etc. are kept as-is without encoding. Example CPE identifiers: - cpe:2.3:*:*:crow:1.0+x:*:*:*:*:*:*:* - cpe:2.3:*:*:sdbus-c++:2.2.1:*:*:*:*:*:*:* Signed-off-by: Stefano Tondo --- meta/lib/oe/cve_check.py | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff --git a/meta/lib/oe/cve_check.py b/meta/lib/oe/cve_check.py index ae194f27cf..fa210e2037 100644 --- a/meta/lib/oe/cve_check.py +++ b/meta/lib/oe/cve_check.py @@ -205,6 +205,34 @@ def get_patched_cves(d): return patched_cves +def cpe_escape(value): + r""" + Escape special characters for CPE 2.3 formatted string binding. + + CPE 2.3 formatted string binding (cpe:2.3:...) uses backslash escaping + for special meta-characters, NOT percent-encoding. Percent-encoding is + only used in the URI binding (cpe:/...). + + According to NISTIR 7695, these characters need escaping: + - Backslash (\) -> \\ + - Question mark (?) -> \? + - Asterisk (*) -> \* + - Colon (:) -> \: + - Plus (+) -> \+ (required by some SBOM validators) + """ + if not value: + return value + + # Escape special meta-characters for CPE 2.3 formatted string binding + # Order matters: escape backslash first to avoid double-escaping + result = value.replace('\\', '\\\\') + result = result.replace('?', '\\?') + result = result.replace('*', '\\*') + result = result.replace(':', '\\:') + result = result.replace('+', '\\+') + + return result + def get_cpe_ids(cve_product, version): """ Get list of CPE identifiers for the given product and version @@ -221,7 +249,14 @@ def get_cpe_ids(cve_product, version): else: vendor = "*" - cpe_id = 'cpe:2.3:*:{}:{}:{}:*:*:*:*:*:*:*'.format(vendor, product, version) + # Encode special characters per CPE 2.3 specification + encoded_vendor = cpe_escape(vendor) if vendor != "*" else vendor + encoded_product = cpe_escape(product) + encoded_version = cpe_escape(version) + + cpe_id = 'cpe:2.3:*:{}:{}:{}:*:*:*:*:*:*:*'.format( + encoded_vendor, encoded_product, encoded_version + ) cpe_ids.append(cpe_id) return cpe_ids