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CVE-2013-1821

5.0 · MEDIUM

lib/rexml/text.rb in the REXML parser in Ruby before 1.9.3-p392 allows remote attackers to cause a denial of service (memory consumption and crash) via crafted text nodes in an XML document, aka an…

Published Apr 9, 2013ruby-langCWE-20EPSS 6.86%

Overview

CVE-2013-1821 is a medium-severity vulnerability affecting ruby-lang ruby. It was published on April 9, 2013 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

lib/rexml/text.rb in the REXML parser in Ruby before 1.9.3-p392 allows remote attackers to cause a denial of service (memory consumption and crash) via crafted text nodes in an XML document, aka an XML Entity Expansion (XEE) attack.

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
ruby-langruby0Affected

References

Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=702525Reflists.opensuse.org/opensuse-security-announce/2013-04/msg00001.htmlReflists.opensuse.org/opensuse-security-announce/2013-04/msg00015.htmlReflists.opensuse.org/opensuse-updates/2013-04/msg00034.htmlReflists.opensuse.org/opensuse-updates/2013-04/msg00036.htmlRefrhn.redhat.com/errata/RHSA-2013-0611.htmlRefrhn.redhat.com/errata/RHSA-2013-0612.htmlRefrhn.redhat.com/errata/RHSA-2013-1028.htmlRefrhn.redhat.com/errata/RHSA-2013-1147.htmlRefsecunia.com/advisories/52783

How CyberStrike helps

Frequently asked questions

What is CVE-2013-1821?

CVE-2013-1821 is a medium-severity vulnerability affecting ruby-lang ruby. It was published on April 9, 2013 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2013-1821?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-1821?

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-2013-1821?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-1821 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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