CentOS Errata and Security Advisory CESA-2013:0640
Apache Tomcat is a servlet container.
It was found that when an application used FORM authentication, along with another component that calls request.setUserPrincipal() before the call to FormAuthenticator#authenticate() (such as the Single-Sign-On valve), it was possible to bypass the security constraint checks in the FORM authenticator by appending "/j_security_check" to the end of a URL. A remote attacker with an authenticated session on an affected application could use this flaw to circumvent authorization controls, and thereby access resources not permitted by the roles associated with their authenticated session. (CVE-2012-3546)
Multiple weaknesses were found in the Tomcat DIGEST authentication implementation, effectively reducing the security normally provided by DIGEST authentication. A remote attacker could use these flaws to perform replay attacks in some circumstances. (CVE-2012-5885, CVE-2012-5886, CVE-2012-5887)
Users of Tomcat should upgrade to these updated packages, which correct these issues. Tomcat must be restarted for this update to take effect.
Merged security bulletin from advisories: http://lists.centos.org/pipermail/centos-announce/2013-March/031683.html
Affected packages: tomcat5 tomcat5-admin-webapps tomcat5-common-lib tomcat5-jasper tomcat5-jasper-javadoc tomcat5-jsp-2.0-api tomcat5-jsp-2.0-api-javadoc tomcat5-server-lib tomcat5-servlet-2.4-api tomcat5-servlet-2.4-api-javadoc tomcat5-webapps
Upstream details at: https://rhn.redhat.com/errata/RHSA-2013-0640.html