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CVE-2009-4124

10.0 · HIGH

Heap-based buffer overflow in the rb_str_justify function in string.c in Ruby 1.9.1 before 1.9.1-p376 allows context-dependent attackers to execute arbitrary code via unspecified vectors involving…

Published Dec 11, 2009ruby-langCWE-119EPSS 3.88%

Overview

CVE-2009-4124 is a high-severity vulnerability affecting ruby-lang ruby. It was published on December 11, 2009 and has a CVSS 2.0 base score of 10.0 (HIGH).

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Heap-based buffer overflow in the rb_str_justify function in string.c in Ruby 1.9.1 before 1.9.1-p376 allows context-dependent attackers to execute arbitrary code via unspecified vectors involving (1) String#ljust, (2) String#center, or (3) String#rjust. NOTE: some of these details are obtained from third party information.

Remediation

Check the references section for vendor advisories and patches from ruby-lang. Update ruby to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refsecunia.com/advisories/37660Refwww.osvdb.org/60880Refwww.ruby-lang.org/en/news/2009/12/07/heap-overflow-in-string/Refwww.securityfocus.com/bid/37278Refwww.vupen.com/english/advisories/2009/3471Refexchange.xforce.ibmcloud.com/vulnerabilities/54674Refsecunia.com/advisories/37660Refwww.osvdb.org/60880Refwww.ruby-lang.org/en/news/2009/12/07/heap-overflow-in-string/Refwww.securityfocus.com/bid/37278

How CyberStrike helps

Frequently asked questions

What is CVE-2009-4124?

CVE-2009-4124 is a high-severity vulnerability affecting ruby-lang ruby. It was published on December 11, 2009 and has a CVSS 2.0 base score of 10.0 (HIGH).

How severe is CVE-2009-4124?

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-4124?

Check the references section for vendor advisories and patches from ruby-lang. Update ruby to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-4124?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-4124 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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