Dawid Golunski from legalhackers.com discovered that Debian's version of Tomcat 6 was vulnerable to a local privilege escalation. Local attackers who have gained access to the server in the context of the tomcat6 user through a vulnerability in a web application were able to replace the file with a symlink to an arbitrary file.

The full advisory can be found at

http://legalhackers.com/advisories/Tomcat-Debian-based-Root-Privilege- Es calation-Exploit.txt

For Debian 7 'Wheezy', these problems have been fixed in version 6.0.45+dfsg-1~deb7u2.

We recommend that you upgrade your tomcat6 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.

Dawid Golunski from legalhackers.com discovered that Debian's version of Tomcat 7 was vulnerable to a local privilege escalation. Local attackers who have gained access to the server in the context of the tomcat7 user through a vulnerability in a web application were able to replace the file with a symlink to an arbitrary file.

The full advisory can be found at

http://legalhackers.com/advisories/Tomcat-Debian-based-Root-Privilege- Escalation-Exploit.txt

In addition this security update also fixes Debian bug #821391. File ownership in /etc/tomcat7 will no longer be unconditionally overridden on upgrade. As another precaution the file permissions of Debian specific configuration files in /etc/tomcat7 were changed to 640 to disallow world readable access.

For Debian 7 'Wheezy', these problems have been fixed in version 7.0.28-4+deb7u6.

We recommend that you upgrade your tomcat7 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.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2017:0455 advisory.

    Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web     applications. It is comprised of the Apache HTTP Server, the Apache Tomcat Servlet container, Apache     Tomcat Connector (mod_jk), JBoss HTTP Connector (mod_cluster), Hibernate, and the Tomcat Native library.

    This release of Red Hat JBoss Web Server 3.1.0 serves as a replacement for Red Hat JBoss Web Server 3.0.3,     and includes enhancements.

    Security Fix(es):

    * It was reported that the Tomcat init script performed unsafe file handling, which could result in local     privilege escalation. (CVE-2016-1240)

    * It was discovered that the Tomcat packages installed certain configuration files read by the Tomcat     initialization script as writeable to the tomcat group. A member of the group or a malicious web     application deployed on Tomcat could use this flaw to escalate their privileges. (CVE-2016-6325)

    * The JmxRemoteLifecycleListener was not updated to take account of Oracle's fix for CVE-2016-3427.
    JMXRemoteLifecycleListener is only included in EWS 2.x and JWS 3.x source distributions. If you deploy a     Tomcat instance built from source, using the EWS 2.x, or JWS 3.x distributions, an attacker could use this     flaw to launch a remote code execution attack on your deployed instance. (CVE-2016-8735)

    * A denial of service vulnerability was identified in Commons FileUpload that occurred when the length of     the multipart boundary was just below the size of the buffer (4096 bytes) used to read the uploaded file     if the boundary was the typical tens of bytes long. (CVE-2016-3092)

    * It was discovered that the code that parsed the HTTP request line permitted invalid characters. This     could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a     different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the     attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests     other then their own. (CVE-2016-6816)

    * A bug was discovered in the error handling of the send file code for the NIO HTTP connector. This led to     the current Processor object being added to the Processor cache multiple times allowing information     leakage between requests including, and not limited to, session ID and the response body. (CVE-2016-8745)

    * The Realm implementations did not process the supplied password if the supplied user name did not exist.
    This made a timing attack possible to determine valid user names. Note that the default configuration     includes the LockOutRealm which makes exploitation of this vulnerability harder. (CVE-2016-0762)

    * It was discovered that a malicious web application could bypass a configured SecurityManager via a     Tomcat utility method that was accessible to web applications. (CVE-2016-5018)

    * It was discovered that when a SecurityManager is configured Tomcat's system property replacement feature     for configuration files could be used by a malicious web application to bypass the SecurityManager and     read system properties that should not be visible. (CVE-2016-6794)

    * It was discovered that a malicious web application could bypass a configured SecurityManager via     manipulation of the configuration parameters for the JSP Servlet. (CVE-2016-6796)

    * It was discovered that it was possible for a web application to access any global JNDI resource whether     an explicit ResourceLink had been configured or not. (CVE-2016-6797)

    The CVE-2016-6325 issue was discovered by Red Hat Product Security.

    Enhancement(s):

    This enhancement update adds the Red Hat JBoss Web Server 3.1.0 packages to Red Hat Enterprise Linux 6.
    These packages provide a number of enhancements over the previous version of Red Hat JBoss Web Server.
    (JIRA#JWS-267)

    Users of Red Hat JBoss Web Server are advised to upgrade to these updated packages, which add this     enhancement.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-201705-09 (Apache Tomcat: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Tomcat. Please review       the CVE identifiers referenced below for details.
  Impact :

    A remote attacker may be able to cause a Denial of Service condition,       obtain sensitive information, bypass protection mechanisms and       authentication restrictions.
    A local attacker, who is a tomcat&rsquo;s system user or belongs to       tomcat&rsquo;s group, could potentially escalate privileges.
  Workaround :

    There is no known workaround at this time.

Dawid Golunski of LegalHackers discovered that the Tomcat init script performed unsafe file handling, which could result in local privilege escalation.

An update is now available for Red Hat JBoss Web Server 3 for RHEL 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.

Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache HTTP Server, the Apache Tomcat Servlet container, Apache Tomcat Connector (mod_jk), JBoss HTTP Connector (mod_cluster), Hibernate, and the Tomcat Native library.

This release of Red Hat JBoss Web Server 3.1.0 serves as a replacement for Red Hat JBoss Web Server 3.0.3, and includes enhancements.

Security Fix(es) :

* It was reported that the Tomcat init script performed unsafe file handling, which could result in local privilege escalation.
(CVE-2016-1240)

* It was discovered that the Tomcat packages installed certain configuration files read by the Tomcat initialization script as writeable to the tomcat group. A member of the group or a malicious web application deployed on Tomcat could use this flaw to escalate their privileges. (CVE-2016-6325)

* The JmxRemoteLifecycleListener was not updated to take account of Oracle's fix for CVE-2016-3427. JMXRemoteLifecycleListener is only included in EWS 2.x and JWS 3.x source distributions. If you deploy a Tomcat instance built from source, using the EWS 2.x, or JWS 3.x distributions, an attacker could use this flaw to launch a remote code execution attack on your deployed instance. (CVE-2016-8735)

* A denial of service vulnerability was identified in Commons FileUpload that occurred when the length of the multipart boundary was just below the size of the buffer (4096 bytes) used to read the uploaded file if the boundary was the typical tens of bytes long.
(CVE-2016-3092)

* It was discovered that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other then their own. (CVE-2016-6816)

* A bug was discovered in the error handling of the send file code for the NIO HTTP connector. This led to the current Processor object being added to the Processor cache multiple times allowing information leakage between requests including, and not limited to, session ID and the response body. (CVE-2016-8745)

* The Realm implementations did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder. (CVE-2016-0762)

* It was discovered that a malicious web application could bypass a configured SecurityManager via a Tomcat utility method that was accessible to web applications. (CVE-2016-5018)

* It was discovered that when a SecurityManager is configured Tomcat's system property replacement feature for configuration files could be used by a malicious web application to bypass the SecurityManager and read system properties that should not be visible. (CVE-2016-6794)

* It was discovered that a malicious web application could bypass a configured SecurityManager via manipulation of the configuration parameters for the JSP Servlet. (CVE-2016-6796)

* It was discovered that it was possible for a web application to access any global JNDI resource whether an explicit ResourceLink had been configured or not. (CVE-2016-6797)

The CVE-2016-6325 issue was discovered by Red Hat Product Security.

Enhancement(s) :

* This enhancement update adds the Red Hat JBoss Web Server 3.1.0 packages to Red Hat Enterprise Linux 7. These packages provide a number of enhancements over the previous version of Red Hat JBoss Web Server. (JIRA#JWS-268)

The remote Ubuntu 16.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-3081-2 advisory.

    Dawid Golunski discovered that the Tomcat init script incorrectly handled creating log files. A remote     attacker could possibly use this issue to obtain root privileges.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3081-1 advisory.

    Dawid Golunski discovered that the Tomcat init script incorrectly handled creating log files. A remote     attacker could possibly use this issue to

    obtain root privileges. (CVE-2016-1240)

    This update also reverts a change in behaviour introduced in USN-3024-1 by setting     mapperContextRootRedirectEnabled to True by default.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
93544	Debian DLA-622-1 : tomcat6 security update	Nessus	Debian Local Security Checks	9/16/2016	1/11/2021	high
93545	Debian DLA-623-1 : tomcat7 security update	Nessus	Debian Local Security Checks	9/16/2016	1/11/2021	high
97595	RHEL 6 : Red Hat JBoss Web Server 3.1.0 (RHSA-2017:0455)	Nessus	Red Hat Local Security Checks	3/8/2017	11/4/2024	critical
100262	GLSA-201705-09 : Apache Tomcat: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	5/18/2017	1/11/2021	critical
93549	Debian DSA-3670-1 : tomcat8 - security update	Nessus	Debian Local Security Checks	9/16/2016	1/11/2021	high
97596	RHEL 7 : Red Hat JBoss Web Server 3.1.0 (RHSA-2017:0456)	Nessus	Red Hat Local Security Checks	3/8/2017	5/14/2023	critical
142021	Ubuntu 16.04 LTS : Tomcat vulnerability (USN-3081-2)	Nessus	Ubuntu Local Security Checks	10/28/2020	8/27/2024	high
93548	Debian DSA-3669-1 : tomcat7 - security update	Nessus	Debian Local Security Checks	9/16/2016	1/11/2021	high
93600	Ubuntu 14.04 LTS / 16.04 LTS : Tomcat vulnerability (USN-3081-1)	Nessus	Ubuntu Local Security Checks	9/20/2016	8/27/2024	high

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