CVE-2015-4411Network attack vector

Service interruption via unanchored ObjectId validation

Published Feb 20, 2020 · Updated Aug 6, 2024

Resource exhaustion in MongoDB BSON for Ruby before 3.0.4 allows remote attackers to interrupt application workers with crafted strings. The ObjectId.legal? method uses Ruby line anchors, causing its regular expression to search successive lines in an oversized multiline value rather than validate only the complete string. Unauthenticated reachability requires an application to pass remote input to this validator; repeated oversized values consume worker resources and interrupt service.

CVSS severity7.5
High
EPSS probability6.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in MongoDB BSON for Ruby before 3.0.4 allows remote attackers to interrupt application workers with crafted strings. The ObjectId.legal? method uses Ruby line anchors, causing its regular expression to search successive lines in an oversized multiline value rather than validate only the complete string. Unauthenticated reachability requires an application to pass remote input to this validator; repeated oversized values consume worker resources and interrupt service.

The record

CVE
CVE-2015-4411
Published
Feb 20, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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