Vulnerability identifier: #VU87534

Vulnerability risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-0763

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Tomcat
Server applications / Web servers

Vendor: Apache Foundation

Description

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to missing authorization within the setGlobalContext() method in org/apache/naming/factory/ResourceLinkFactory.java. A remote user can bypass intended SecurityManager restrictions and read or write to arbitrary application data, or cause a denial of service (application disruption), via a web application that sets a crafted global context.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 9.0.0-M1 - 9.0.0-M2, 8.0.0 - 8.0.30, 7.0.0 - 7.0.67

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External links
http://svn.apache.org/viewvc?view=revision&revision=1725931
http://svn.apache.org/viewvc?view=revision&revision=1725929
http://tomcat.apache.org/security-8.html
http://tomcat.apache.org/security-9.html
http://tomcat.apache.org/security-7.html
http://seclists.org/bugtraq/2016/Feb/147
http://svn.apache.org/viewvc?view=revision&revision=1725926
http://www.debian.org/security/2016/dsa-3530
http://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158626
http://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150442
http://www.debian.org/security/2016/dsa-3609
http://www.ubuntu.com/usn/USN-3024-1
http://www.debian.org/security/2016/dsa-3552
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
http://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05324755
http://www.securityfocus.com/bid/83326
http://access.redhat.com/errata/RHSA-2016:1087
http://rhn.redhat.com/errata/RHSA-2016-1089.html
http://access.redhat.com/errata/RHSA-2016:1088
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00069.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00047.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00085.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179356.html
http://bto.bluecoat.com/security-advisory/sa118
http://www.securitytracker.com/id/1035069
http://security.gentoo.org/glsa/201705-09
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://rhn.redhat.com/errata/RHSA-2016-2808.html
http://rhn.redhat.com/errata/RHSA-2016-2807.html
http://rhn.redhat.com/errata/RHSA-2016-2599.html
http://security.netapp.com/advisory/ntap-20180531-0001/
http://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E
http://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.