CVE-2016-5388

Apache Tomcat 7.x through 7.0.70 and 8.x through 8.5.4, when the CGI Servlet is enabled, follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue. NOTE: the vendor states "A mitigation is planned for future releases of Tomcat, tracked as CVE-2016-5388"; in other words, this is not a CVE ID for a vulnerability.

TuxCare rebuilt 7 packages to address 11 CVEs. Fixed in 7.0.70-tuxcare.3.

Apache Tomcat through 8.5.4, when the CGI Servlet is enabled, follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue (CVE-2016-5388).

This update for tomcat fixes the following issues:

• CVE-2016-3092: Usage of vulnerable FileUpload package can result in denial of service. (bsc#986359)
• CVE-2016-5388: Setting HTTP_PROXY environment variable via Proxy header. (bsc#988489)

This update for tomcat6 fixes the following issue:

• CVE-2016-5388 Setting HTTP_PROXY environment variable via Proxy header (bsc#988489)

This update for tomcat6 fixes the following issues:

Tomcat was updated to version 6.0.53:

The full changelog is: http://tomcat.apache.org/tomcat-6.0-doc/changelog.html

Security issues fixed:

• CVE-2017-5647: A bug in the handling of pipelined requests could lead to information disclosure (bsc#1036642)
• CVE-2016-8745: Regression in the error handling methods could lead to information disclosure (bsc#1015119)
• CVE-2016-8735: Remote code execution vulnerability in JmxRemoteLifecycleListener (bsc#1011805)
• CVE-2016-6816: HTTP Request smuggling vulnerability due to permitting invalid character in HTTP requests (bsc#1011812)
• CVE-2016-6797: Unrestricted Access to Global Resources (bsc#1007853)
• CVE-2016-6796: Manager Bypass (bsc#1007858)
• CVE-2016-6794: System Property Disclosure (bsc#1007857)
• CVE-2016-5018: Security Manager Bypass (bsc#1007855)
• CVE-2016-0762: Realm Timing Attack (bsc#1007854)
• CVE-2016-5388: an arbitrary HTTP_PROXY environment variable might allow remote attackers to redirect outbound HTTP traffic (bsc#988489)

Tomcat was updated to version 7.0.78, fixing various bugs and security issues.

For full details see https://tomcat.apache.org/tomcat-7.0-doc/changelog.html

Security issues fixed:

• CVE-2016-0762: A realm timing attack in tomcat was fixed which could disclose existence of users (bsc#1007854)
• CVE-2016-3092: Usage of vulnerable FileUpload package could have resulted in denial of service (bsc#986359)
• CVE-2016-5018: A security manager bypass via a Tomcat utility method that was accessible to web applications was fixed. (bsc#1007855)
• CVE-2016-5388: Setting HTTP_PROXY environment variable via Proxy header (bsc#988489)
• CVE-2016-6794: A tomcat system property disclosure was fixed. (bsc#1007857)
• CVE-2016-6796: A tomcat security manager bypass via manipulation of the configuration parameters for the JSP Servlet. (bsc#1007858)
• CVE-2016-6797: A tomcat unrestricted access to global resources via ResourceLinkFactory was fixed. (bsc#1007853)
• CVE-2016-6816: A HTTP Request smuggling vulnerability due to permitting invalid character in HTTP requests was fixed. (bsc#1011812)
• CVE-2016-8735: A Remote code execution vulnerability in JmxRemoteLifecycleListener was fixed (bsc#1011805)
• CVE-2016-8745: A Tomcat Information Disclosure in the error handling of send file code for the NIO HTTP connector was fixed. (bsc#1015119)
• CVE-2017-5647: A tomcat information disclosure in pipelined request processing was fixed. (bsc#1033448)
• CVE-2017-5648: A tomcat information disclosure due to using incorrect facade objects was fixed (bsc#1033447)

It was discovered that the Tomcat realm implementations incorrectly handled passwords when a username didn't exist. A remote attacker could possibly use this issue to enumerate usernames. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-0762)

Alvaro Munoz and Alexander Mirosh discovered that Tomcat incorrectly limited use of a certain utility method. A malicious application could possibly use this to bypass Security Manager restrictions. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-5018)

It was discovered that Tomcat did not protect applications from untrusted data in the HTTP_PROXY environment variable. A remote attacker could possibly use this issue to redirect outbound traffic to an arbitrary proxy server. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-5388)

It was discovered that Tomcat incorrectly controlled reading system properties. A malicious application could possibly use this to bypass Security Manager restrictions. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-6794)

It was discovered that Tomcat incorrectly controlled certain configuration parameters. A malicious application could possibly use this to bypass Security Manager restrictions. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-6796)

It was discovered that Tomcat incorrectly limited access to global JNDI resources. A malicious application could use this to access any global JNDI resource without an explicit ResourceLink. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-6797)

Regis Leroy discovered that Tomcat incorrectly filtered certain invalid characters from the HTTP request line. A remote attacker could possibly use this issue to inject data into HTTP responses. (CVE-2016-6816)

Pierre Ernst discovered that the Tomcat JmxRemoteLifecycleListener did not implement a recommended fix. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2016-8735)

It was discovered that Tomcat incorrectly handled error handling in the send file code. A remote attacker could possibly use this issue to access information from other requests. (CVE-2016-8745)

Paul Szabo discovered that the Tomcat package incorrectly handled upgrades and removals. A local attacker could possibly use this issue to obtain root privileges. (CVE-2016-9774, CVE-2016-9775)

It was discovered that Apache Tomcat 7 did not protect applications from the presence of untrusted client data in an environment variable. A remote attacker could possible use this vulnerability to redirect the traffic to an arbitrary proxy and obtain sensitive information. (CVE-2016-5388)

It was discovered that Apache Tomcat 7 mishandled specially crafted input. An attacker could use this vulnerability to cause a denial of service. (CVE-2018-1336)