Cedric Champeau reports :

Description

When an application has Groovy on the classpath and that it uses standard Java serialization mechanism to communicate between servers, or to store local data, it is possible for an attacker to bake a special serialized object that will execute code directly when deserialized. All applications which rely on serialization and do not isolate the code which deserializes objects are subject to this vulnerability.

Fix remote code execution vulnerability

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

cpnrodzc7, working with HP's Zero Day Initiative, discovered that Java applications using standard Java serialization mechanisms to decode untrusted data, and that have Groovy on their classpath, can be passed a serialized object that will cause the application to execute arbitrary code.

For the oldoldstable distribution (squeeze), this problem has been fixed in version 1.7.0-4+deb6u1.

For the oldstable distribution (wheezy) and stable distribution (jessie), this problem will be fixed soon.

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.

From Red Hat Security Advisory 2017:2486 :

An update for groovy is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Groovy is an agile and dynamic language for the Java Virtual Machine, built upon Java with features inspired by languages like Python, Ruby, and Smalltalk. It seamlessly integrates with all existing Java objects and libraries and compiles straight to Java bytecode so you can use it anywhere you can use Java.

Security Fix(es) :

* It was found that a flaw in Apache groovy library allows remote code execution wherever deserialization occurs in the application. It is possible for an attacker to craft a special serialized object that will execute code directly when deserialized. All applications which rely on serialization and do not isolate the code which deserializes objects are subject to this vulnerability. (CVE-2016-6814)

An update for groovy is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Groovy is an agile and dynamic language for the Java Virtual Machine, built upon Java with features inspired by languages like Python, Ruby, and Smalltalk. It seamlessly integrates with all existing Java objects and libraries and compiles straight to Java bytecode so you can use it anywhere you can use Java.

Security Fix(es) :

* It was found that a flaw in Apache groovy library allows remote code execution wherever deserialization occurs in the application. It is possible for an attacker to craft a special serialized object that will execute code directly when deserialized. All applications which rely on serialization and do not isolate the code which deserializes objects are subject to this vulnerability. (CVE-2016-6814)

The remote host is affected by the vulnerability described in GLSA-201610-01 (Groovy: Arbitrary code execution)

    Groovy&rsquo;s MethodClosure class, in runtime/MethodClosure.java, is       vulnerable to a crafted serialized object.
  Impact :

    Remote attackers could potentially execute arbitrary code, or cause       Denial of Service condition   Workaround :

    A workaround exists by using a custom security policy file utilizing the       standard Java security manager, or do not rely on serialization to       communicate remotely.

ID	Name	Product	Family	Published	Updated	Severity
84814	FreeBSD : groovy -- remote execution of untrusted code (67b3fef2-2bea-11e5-86ff-14dae9d210b8)	Nessus	FreeBSD Local Security Checks	7/17/2015	1/6/2021	critical
102899	Fedora 26 : groovy18 (2017-9899aba20e)	Nessus	Fedora Local Security Checks	9/1/2017	1/6/2021	critical
84832	Debian DLA-274-1 : groovy security update	Nessus	Debian Local Security Checks	7/20/2015	1/11/2021	critical
102570	Oracle Linux 7 : groovy (ELSA-2017-2486)	Nessus	Oracle Linux Local Security Checks	8/18/2017	1/14/2021	critical
102897	Fedora 25 : groovy18 (2017-6a0389a6a7)	Nessus	Fedora Local Security Checks	9/1/2017	1/6/2021	critical
102574	RHEL 7 : groovy (RHSA-2017:2486)	Nessus	Red Hat Local Security Checks	8/18/2017	10/24/2019	critical
102879	CentOS 7 : groovy (CESA-2017:2486)	Nessus	CentOS Local Security Checks	9/1/2017	1/4/2021	critical
93902	GLSA-201610-01 : Groovy: Arbitrary code execution	Nessus	Gentoo Local Security Checks	10/7/2016	1/11/2021	critical

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