CVE-2025-12036 脆弱性: 新しい重大な Chrome V8 JavaScript リモートコードエクスプロイト

Ruslan Mikhalov Chief of Threat Research at SOC Prime

CVE-2025-12036 脆弱性: 新しい重大な Chrome V8 JavaScript リモートコードエクスプロイト

Detection stack

AIDR
Alert
ETL
Query

脅威レポート
検出
シミュレーション

分析

CVE‑2025‑62215は、Windowsカーネルにおける重大なレースコンディションの脆弱性で、2025年11月にMicrosoftのPatch Tuesdayで修正されました。この欠陥により、低権限のローカルアクセスを持つ攻撃者がカーネルメモリにおける「ダブルフリー」状態を悪用して、特権をSYSTEMに昇格させることができます。これは積極的に悪用されており、すべてのサポートされているWindows OSエディション（およびWindows 10のESU）に影響を与えるため、組織はシステム全体の危殆化の実際のリスクに直面しています。

調査

CVE-2025-12036への露出を調査するには、セキュリティチームはまずChromeやその他のChromiumベースのブラウザを使用しているすべてのエンドポイントをマッピングすることから始めるべきです。Windows、macOS、Linux全体でのブラウザバージョンをインベントリし、Chrome 141.0.7390.122/.123より前のビルドを実行しているシステムを潜在的に脆弱であると旗を立てます。次に、未パッチのエンドポイントがハイリスクなブラウジング活動の期間とどのように相関するかを確認します。これには、不審なウェブサイトへのアクセス、最近のフィッシングキャンペーン、またはサイバー攻撃疑念のあるドメインへのアクセスが含まれます。EDRツールからのテレメトリや、ブラウザ拡張機能のログ、プロキシやファイアウォールログを確認し、重いJavaScriptを提供する不審な新規登録ドメインへの訪問や、ブラウザクラッシュ、異常なサンドボックス挙動でエクスプロイト試行を示す可能性のあるもの、およびブラウザから生成された異常なプロセスチェーン、コマンドシェルやスクリプトエンジンを含むものを探します。範囲を拡大するためには、CVEタグ付きの検出コンテンツとハンティングクエリをSIEM、EDR、データレイクで使用し、Drive-by CompromiseやClient ExecutionのエクスプロイトなどMITRE ATT&CKテクニックに結果を整合させます。

緩和策

CVE-2025-12036の悪用がユーザーが悪意のあるページを訪れた際に容易に実現されるため、パッチ適用は緊急対応と見なされるべきです。すべてのChromiumベースのブラウザをWindowsとmacOSの場合はChrome 141.0.7390.122/.123、Linuxの場合は141.0.7390.122以上に更新し、可能な限り自動更新を有効にします。セキュリティチームは、パッチの状況を確認し、ユーザーに 設定→Chromeについて に訪問させるか、MDMを介して強制することで、ブラウザが最新の修正を取得し適用できるようにします。同時に、エンドポイントでの最小特権を強制し、既知の悪意あるドメインや高リスクのドメインをブロックするためにURLフィルタリングと安全なウェブゲートウェイを使用し、サイト分離や厳格な拡張機能ポリシーなどの保護を有効にしてブラウザの使用を強化します。最後に、脆弱性管理にCVE-2025-12036を統合し、古いChromeビルドを持つ新たに展開されたシステムやあまり使用されていないシステムを迅速に特定し、修正します。

対応

CVE-2025-12036が環境内で悪用されたと疑われる場合は、信頼できないネットワークから影響を受けたエンドポイントを隔離すると同時に、フォレンジック分析のためにアクセス可能に保ちます。証拠を保存し、関連プロセスのブラウザのメモリイメージ、システムおよびアプリケーションログ（特にChromeのクラッシュレポートやブラウザの履歴）、疑わしいエクスプロイトの時間枠に関するネットワークキャプチャを含めます。次に、悪用後の活動を探索し、新しいスケジュールされたタスクやサービスなどの異常な持続メカニズム、リスキーなブラウジングセッションの後にドロップされた疑わしいバイナリやスクリプト、およびパスワードストアアクセス、トークンダンピング、異常な認証イベントのようなクレデンシャル盗難の兆候を探します。悪意あるファイルや持続化アーティファクトを削除し、高リスクエンドポイントの再イメージングを必要に応じて行い、封じ込めおよび排除を行います。最後に、クレデンシャルを回転させ、ブラウザ/V8 RCEパターンの検出コンテンツを更新し、CVE-2025-12036に関連するドライブバイ悪用リスクと安全なブラウジングの実践についてユーザーおよび管理者に説明することで、回復と改善を行います。

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無料で参加

Name	Descripiton
PHPSESSID	Preserves user session state across page requests. Cookie generated by applications based on the PHP language. This is a general purpose identifier used to maintain user session variables. It is normally a random generated number, how it is used can be specific to the site, but a good example is maintaining a logged-in status for a user between pages.
sp_i	Used to store information about authenticated User.
sp_r	Used to store information about authenticated User.
sp_a	Used to store information about authenticated User.

Name	Descripiton
tuuid	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
tuuid_last_update	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
um	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
umeh	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
na_sc_x	Used by the social sharing platform AddThis to keep a record of parts of the site that has been visited in order to recommend other parts of the site.
APID	Collects anonymous data related to the user's visits to the website.
IDSYNC	Collects anonymous data related to the user's visits to the website.
_cc_aud	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
_cc_cc	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
_cc_dc	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
_cc_id	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
dpm	Via a unique ID that is used for semantic content analysis, the user's navigation on the website is registered and linked to offline data from surveys and similar registrations to display targeted ads.
acs	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded, with the purpose of displaying targeted ads.
clid	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded, with the purpose of displaying targeted ads.
KRTBCOOKIE_#	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
PUBMDCID	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
PugT	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
ssi	Registers a unique ID that identifies a returning user's device. The ID is used for targeted ads.
_tmid	Registers a unique ID that identifies the user's device upon return visits. The ID is used to target ads in video clips.
wam-sync	Used by the advertising platform Weborama to determine the visitor's interests based on pages visits, content clicked and other actions on the website.
wui	Used by the advertising platform Weborama to determine the visitor's interests based on pages visits, content clicked and other actions on the website.
AFFICHE_W	Used by the advertising platform Weborama to determine the visitor's interests based on pages visits, content clicked and other actions on the website.
B	Collects anonymous data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The registered data is used to categorise the users' interest and demographical profiles with the purpose of customising the website content depending on the visitor.
1P_JAR	These cookies are used to gather website statistics, and track conversion rates.
APISID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
HSID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
NID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
SAPISID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
SID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
SIDCC	Security cookie to protect users data from unauthorised access.
SSID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
__utmx	This cookie is associated with Google Website Optimizer, a tool designed to help site owners improve their wbesites. It is used to distinguish between two varaitions a webpage that might be shown to a visitor as part of an A/B split test. This helps site owners to detemine which version of a page performs better, and therefore helps to improve the website.
__utmxx	This cookie is associated with Google Website Optimizer, a tool designed to help site owners improve their wbesites. It is used to distinguish between two varaitions a webpage that might be shown to a visitor as part of an A/B split test. This helps site owners to detemine which version of a page performs better, and therefore helps to improve the website.

Name	Descripiton
_hjid	Hotjar cookie. This cookie is set when the customer first lands on a page with the Hotjar script. It is used to persist the random user ID, unique to that site on the browser. This ensures that behavior in subsequent visits to the same site will be attributed to the same user ID.
_hjIncludedInSample	This cookie is associated with web analytics functionality and services from Hot Jar, a Malta based company. It uniquely identifies a visitor during a single browser session and indicates they are included in an audience sample.
intercom-id-[xxx]	This cookie is used by Intercom as a session so that users can continue a chat as they move through the site.
intercom-session-[xxx]	Used to keeping track of sessions and remember logins and conversations.
demdex	Via a unique ID that is used for semantic content analysis, the user's navigation on the website is registered and linked to offline data from surveys and similar registrations to display targeted ads.
CookieConsent	Stores the user's cookie consent state for the current domain.
__cfduid	Used by the content network, Cloudflare, to identify trusted web traffic.
ss	These cookies enable the website to provide enhanced functionality and personalisation . They may be set by us or by third party providers whose services we have added to our pages. These services may include the Live Chat facility, Contact Us form(s), the Product Quotation forms and submission process, and the Email Newsletter sign up functionality .

Name	Descripiton
_ga	This cookie name is asssociated with Google Universal Analytics - which is a significant update to Google's more commonly used analytics service. This cookie is used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page. Registers a unique ID that is used to generate statistical data on how the visitor uses the website. request in a site and used to calculate visitor, session and campaign data for the sites analytics reports. By default it is set to expire after 2 years, although this is customisable by website owners.
_gat	Used by Google Analytics to throttle request rate. This cookie name is associated with Google Universal Analytics, according to documentation it is used to throttle the request rate - limiting the collection of data on high traffic sites. It expires after 10 minutes.
_gid	This cookie name is asssociated with Google Universal Analytics. This appears to be a new cookie and as of Spring 2017 no information is available from Google. It appears to store and update a unique value for each page visited. Registers a unique ID that is used to generate statistical data on how the visitor uses the website.
IDE	Used by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.
r/collect	Used by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.
test_cookie	Used to check if the user's browser supports cookies.
collect	Used to send data to Google Analytics about the visitor's device and behaviour. Tracks the visitor across devices and marketing channels.
ads/user-lists/#	These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites.
c	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
khaos	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
put_#	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
rpb	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
rpx	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
tap.php	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.