CVE-2015-4411

CVE-2015-4411 is a high-severity vulnerability in Mongodb Bson with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• CVSS v2: 5.0
• EPSS exploit prediction: 6% (93rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-400
• Affected product: Mongodb Bson
• Published: 2020-02-20
• Last modified: 2026-06-17

Description

The Moped::BSON::ObjecId.legal? method in mongodb/bson-ruby before 3.0.4 as used in rubygem-moped allows remote attackers to cause a denial of service (worker resource consumption) via a crafted string. NOTE: This issue is due to an incomplete fix to CVE-2015-4410.

Frequently asked questions

What is CVE-2015-4411?

The Moped::BSON::ObjecId.legal? method in mongodb/bson-ruby before 3.0.4 as used in rubygem-moped allows remote attackers to cause a denial of service (worker resource consumption) via a crafted string. NOTE: This issue is due to an incomplete fix to CVE-2015-4410.

How severe is CVE-2015-4411?

CVE-2015-4411 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2015-4411 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4411?

CVE-2015-4411 primarily affects Mongodb Bson. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-4411?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-4411 published?

CVE-2015-4411 was published on 2020-02-20 and last updated on 2026-06-17.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161964.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161987.html
• http://www.openwall.com/lists/oss-security/2015/06/06/3
• http://www.securityfocus.com/bid/75045
• https://bugzilla.redhat.com/show_bug.cgi?id=1229706
• https://github.com/mongodb/bson-ruby/commit/976da329ff03ecdfca3030eb6efe3c85e6db9999
• https://github.com/mongodb/bson-ruby/commit/fef6f75413511d653c76bf924a932374a183a24f#diff-8c8558c185bbb548ccb5a6d6ac4bfee5R191
• https://github.com/mongodb/bson-ruby/compare/7446d7c6764dfda8dc4480ce16d5c023e74be5ca...28f34978a85b689a4480b4d343389bf4886522e7
• https://github.com/mongoid/moped/commit/dd5a7c14b5d2e466f7875d079af71ad19774609b#diff-3b93602f64c2fe46d38efd9f73ef5358R24
• https://homakov.blogspot.ru/2012/05/saferweb-injects-in-various-ruby.html
• https://sakurity.com/blog/2015/06/04/mongo_ruby_regexp.html
• https://seclists.org/oss-sec/2015/q2/653
• https://security-tracker.debian.org/tracker/CVE-2015-4411
• https://www.securityfocus.com/bid/75045

Affected products (3)

• cpe:2.3:a:mongodb:bson:*:*:*:*:*:ruby:*:*
• cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*

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