SB2015030606 - Ubuntu update for tomcat6, tomcat7

Description

This security bulletin contains information about 4 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2013-4286)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to perform a request-smuggling attack.

The vulnerability exists due to HTTP connector or AJP connector is used, does not properly handle certain inconsistent HTTP request headers. A remote attacker can trigger incorrect identification of a request's length and conduct request-smuggling attacks via multiple Content-Length headers or a Content-Length header and a "Transfer-Encoding: chunked" header.

This vulnerability exists because of an incomplete fix for CVE-2005-2090.

2) Input validation error (CVE-ID: CVE-2013-4322)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to Apache Tomcat processes chunked transfer coding without properly handling a large total amount of chunked data or whitespace characters in an HTTP header value within a trailer field. A remote attacker can cause a denial of service by streaming data.

3) Input validation error (CVE-ID: CVE-2014-0033)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to perform a session fixation attack

The vulnerability exists due to org/apache/catalina/connector/CoyoteAdapter.java in Apache Tomcat does not consider the disableURLRewriting setting when handling a session ID in a URL. A remote attacker can pass specially crafted URL and perform a session fixation attack.

4) Infinite loop (CVE-ID: CVE-2014-0050)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause DoS conditions on the target system.

The weakness exists due to boundary error when handling Content-Type HTTP header for multipart requests. By sending a specially crafted Content-Type header, containing 4092 characters in "boundary" field, a remote attacker can cause the application to enter into an infinite loop.

Successful exploitation of the vulnerability results in denial of service on the vulnerable system.

Note: the vulnerability was being actively exploited.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-2130-1