A important pre-authentication denial of service vulnerability was recognized as CVE-2025-6709, affecting a number of variations of MongoDB Server throughout its 6.0, 7.0, and eight.0 launch branches.
Summary1. MongoDB CVE-2025-6709 permits unauthenticated attackers to crash servers (CVSS 7.5).2. Malicious JSON payloads with crafted date values despatched through MongoDB shell exploit OIDC authentication flaws.3. MongoDB Server v6.0 (prior-6.0.21), v7.0 (prior-7.0.17), and v8.0 (prior-8.0.5).4. Replace instantly to patched variations or disable OIDC authentication as momentary mitigation
The vulnerability stems from improper enter validation within the server’s OpenID Join (OIDC) authentication mechanism, permitting attackers to crash database cases with out requiring authentication credentials.
With a CVSS rating of seven.5, this high-severity flaw poses vital dangers to organizations working weak MongoDB deployments in manufacturing environments.
MongoDB DoS Vulnerability
The vulnerability categorized beneath CWE-20 (Improper Enter Validation), exploits flawed dealing with of particular date values inside JSON payloads throughout OIDC authentication processes.
Attackers can leverage the MongoDB shell (mongo) to transmit specifically crafted malicious JSON knowledge that triggers an invariant failure situation, in the end main to finish server crashes.
The assault mechanism bypasses conventional authentication necessities, making it notably harmful because it allows unauthenticated distant attackers to disrupt database operations.
The technical root trigger entails insufficient sanitization and validation of date-formatted enter knowledge throughout the OIDC authentication pipeline.
When the MongoDB server processes these malformed date values, the parsing logic encounters surprising knowledge buildings that violate inner assumptions, inflicting the server course of to terminate unexpectedly.
This represents a traditional enter validation vulnerability the place inadequate boundary checking and knowledge kind validation create exploitable situations.
Danger FactorsDetailsAffected Merchandise– MongoDB Server v6.0 (prior to six.0.21)- MongoDB Server v7.0 (previous to 7.0.17)- MongoDB Server v8.0 (prior to eight.0.5)ImpactDenial of Service (DoS)Exploit PrerequisitesNo authentication required (pre-auth)Community entry to MongoDB serverAbility to ship JSON payloads through mongo shellCVSS 3.1 Score7.5 (Excessive)
The vulnerability impacts three main MongoDB Server launch branches with various severity ranges.
MongoDB Server v7.0 variations previous to 7.0.17 and v8.0 variations prior to eight.0.5 are prone to pre-authentication exploitation, permitting utterly unauthenticated attackers to set off denial of service situations remotely.
MongoDB Server v6.0 variations prior to six.0.21 additionally include the vulnerability, although exploitation requires profitable authentication, decreasing the rapid menace floor however nonetheless presenting dangers from authenticated customers.
Organizations working these weak variations face potential service disruptions, particularly in high-availability environments the place database downtime instantly impacts enterprise operations.
The network-based assault vector (AV:N) mixed with low assault complexity (AC:L) makes this vulnerability notably regarding for internet-facing MongoDB deployments or these accessible by compromised community segments.
Mitigations
In line with the advisory, Safety groups ought to prioritize rapid patching to the newest secure releases: MongoDB Server 6.0.21, 7.0.17, or 8.0.5, relying on their present deployment model.
Organizations unable to implement rapid patches ought to contemplate implementing network-level entry controls, disabling OIDC authentication briefly if not important to operations, or deploying net software firewalls able to filtering malicious JSON payloads.
The pre-authentication nature of this vulnerability makes it a pretty goal for menace actors looking for to disrupt database providers with out refined assault methods.
Database directors ought to monitor for uncommon connection patterns, implement complete logging round OIDC authentication makes an attempt, and set up incident response procedures for speedy service restoration following potential exploitation makes an attempt.
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