Apache Tomcat is a web server application that is widely used to host and manage web pages and applications. Tomcat is an open-source software that is known for its reliability, flexibility, and scalability. The software serves as a trusted platform for developing and deploying Java-based applications in enterprises. Tomcat is preferred by developers as it provides an advanced development environment that enables the creation of complex web applications with ease.
One of the security vulnerabilities that were detected in Apache Tomcat is CVE-2018-11784. This vulnerability is present in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33, and 7.0.23 to 7.0.90. The vulnerability allows attackers to bypass the intended redirect URL and redirect users to an arbitrary URL of their choice. This vulnerability can be exploited by sending a specially crafted URL to the targeted server that would indicate the server to redirect users to a manipulated URL.
If the CVE-2018-11784 vulnerability is exploited, an attacker can redirect the user to a website or page containing malicious content. This can lead to the user's system being compromised, and the attacker can take control of the target system. Once the attacker gains control of the system, they can steal sensitive data, install malware, and conduct other malicious activities that can adversely impact the user's system.
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REFERENCES
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00030.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00056.html
- http://www.securityfocus.com/bid/105524
- https://access.redhat.com/errata/RHSA-2019:0130
- https://access.redhat.com/errata/RHSA-2019:0131
- https://access.redhat.com/errata/RHSA-2019:0485
- https://access.redhat.com/errata/RHSA-2019:1529
- https://kc.mcafee.com/corporate/index?page=content&id=SB10284
- https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/23134c9b5a23892a205dc140cdd8c9c0add233600f76b313dda6bd75@%3Cannounce.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/5c0e00fd31efc11e147bf99d0f03c00a734447d3b131ab0818644cdb@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/eb6efa8d59c45a7a9eff94c4b925467d3b3fec8ba7697f3daa314b04@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a@%3Cdev.tomcat.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2018/10/msg00005.html
- https://lists.debian.org/debian-lts-announce/2018/10/msg00006.html
- https://lists.fedoraproject.org/archives/list/[email protected]/message/BZ4PX4B3QTKRM35VJAVIEOPZAF76RPBP/
- https://seclists.org/bugtraq/2019/Dec/43
- https://security.netapp.com/advisory/ntap-20181014-0002/
- https://usn.ubuntu.com/3787-1/
- https://www.debian.org/security/2019/dsa-4596
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
To protect against this vulnerability, server administrators can take the following precautions:
- Update Apache Tomcat to the latest version that is not affected by this vulnerability.
- Implement strict input validation to avoid accepting crafted URLs from attackers.
- Disable directory redirects in the default servlet configuration.
- Configure the server to redirect users to an absolute URL instead of a relative URL.
- Monitor all incoming server requests for suspicious activity.
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