MongoBleed (CVE-2025-14847)

Ruslan Mikhalov Chief of Threat Research at SOC Prime

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Detection stack

AIDR
Alert
ETL
Query

Bedrohungsbericht
Angriffsablauf
Erkennungen
Simulationen

Zusammenfassung

MongoBleed (CVE-2025-14847) ist eine Speicheroffenlegungs-Schwachstelle in der zlib-Dekomprimierung von MongoDB, die es nicht authentifizierten Angreifern ermöglichen kann, sensible Daten aus dem Serverspeicher zu leaken. Sie betrifft mehrere MongoDB-Versionen und kann durch das Öffnen von Tausenden schneller Verbindungen ohne Client-Metadaten ausgelöst werden. Die Erkennung ist schwierig, da die Aktivität größtenteils nur in den MongoDB-Serverprotokollen sichtbar ist. Um bei der Suche nach diesem Muster zu helfen, stellt der Autor ein Velociraptor-Artefakt zur Verfügung.

Untersuchung

Das Velociraptor-Artefakt analysiert JSON-formatierte MongoDB-Protokolle für Verbindungs- (Ereignis 22943), Metadaten- (Ereignis 51800) und Trennungsereignisse (Ereignis 22944). Es aggregiert Verbindungen nach Quell-IP, berechnet die Verbindungsgeschwindigkeit und Metadatengeschwindigkeit und weist Risikobewertungen zu. Labortests an verwundbaren MongoDB-Containern zeigten, dass das Artefakt hochfrequenten, metadatenarmen Verkehr flaggt, der mit MongoBleed-Ausnutzungsversuchen übereinstimmt.

Minderung

Wenden Sie die offiziellen Patches von MongoDB (8.2.3, 8.0.17, 7.0.28, 6.0.27) an, um das Problem zu beheben. Aktivieren Sie die Protokollaufbewahrung und JSON-Protokollierung, damit Beweise für Analysen vorliegen. Setzen Sie das Velociraptor-Erkennungsartefakt ein, um abnormalen Verbindungsverhalten zu überwachen, und passen Sie die Schwellenwerte an, um Fehlalarme zu reduzieren.

Antwort

Wenn ein Hochrisikoindikator ausgelöst wird, isolieren Sie das betroffene MongoDB-Exemplar, validieren Sie, ob eine Ausnutzung stattfand, und sammeln Sie Protokolle und Speicher für die Forensik. Drehen Sie alle potenziell exponierten Anmeldedaten oder Token und sanieren Sie betroffene Dienste. Setzen Sie die Überwachung auf Wiederholungsaktivitäten fort, bestätigen Sie, dass alle Bereitstellungen gepatcht sind, und deaktivieren Sie die Komprimierung, wo sie nicht benötigt wird.

Angriffsablauf

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Erkennungen

Mögliche CVE-2025-14847 – Übermäßige akzeptierte Verbindungsereignisse von einem einzelnen Remote (via mongodb)

SOC Prime Team

05 Jan 2026

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Simulation

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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.
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APID	Collects anonymous data related to the user's visits to the website.
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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.
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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.
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Name	Descripiton
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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.
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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.
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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.