An exploitable heap overflow vulnerability exists in the Psych::Emitter start_document function of Ruby. In Psych::Emitter start_document function heap buffer "head" allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

An exploitable heap overflow vulnerability exists in the Psych::Emitter startdocument function of Ruby. In Psych::Emitter startdocument function heap buffer 'head' allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow

For Debian 8 'Jessie', this problem has been fixed in version 2.1.5-2+deb8u9.

We recommend that you upgrade your ruby2.1 packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
195418	RHEL 6 : ruby (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
195359	RHEL 7 : ruby (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
134915	Debian DLA-2158-1 : ruby2.1 security update	Nessus	Debian Local Security Checks	critical

Detections

Analytics

CVE-2016-2338

critical

Tenable Plugins

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critical

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