jakarta-taglibs-standard is the Java Standard Tag Library . This library is used in conjunction with Tomcat and Java Server Pages . It was found that the Java Standard Tag Library allowed the processing of untrusted XML documents to utilize external entity references, which could access resources on the host system and, potentially, allowing arbitrary code execution. Note: jakarta-taglibs-standard users may need to take additional steps after applying this update. Detailed instructions on the additional steps can be found here: https://access.redhat.com/solutions/1584363 All jakarta-taglibs-standard users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed : 1198606 - CVE-2015-0254 jakarta-taglibs-standard: XXE and RCE via XSL extension in JSTL XML tags 6. Package List: Red Hat Enterprise Linux Desktop Optional : Source: jakarta-taglibs-standard-1.1.1-11.7.el6_7.src.rpm noarch: jakarta-taglibs-standard-1.1.1-11.7.el6_7.noarch.rpm jakarta-taglibs-standard-javadoc-1.1.1-11.7.el6_7.noarch.rpm Red Hat Enterprise Linux HPC Node Optional : Source: jakarta-taglibs-standard-1.1.1-11.7.el6_7.src.rpm noarch: jakarta-taglibs-standard-1.1.1-11.7.el6_7.noarch.rpm jakarta-taglibs-standard-javadoc-1.1.1-11.7.el6_7.noarch.rpm Red Hat Enterprise Linux Server Optional : Source: jakarta-taglibs-standard-1.1.1-11.7.el6_7.src.rpm noarch: jakarta-taglibs-standard-1.1.1-11.7.el6_7.noarch.rpm jakarta-taglibs-standard-javadoc-1.1.1-11.7.el6_7.noarch.rpm Red Hat Enterprise Linux Workstation Optional : Source: jakarta-taglibs-standard-1.1.1-11.7.el6_7.src.rpm noarch: jakarta-taglibs-standard-1.1.1-11.7.el6_7.noarch.rpm jakarta-taglibs-standard-javadoc-1.1.1-11.7.el6_7.noarch.rpm Red Hat Enterprise Linux Client Optional : Source: jakarta-taglibs-standard-1.1.2-14.el7_1.src.rpm noarch: jakarta-taglibs-standard-1.1.2-14.el7_1.noarch.rpm jakarta-taglibs-standard-javadoc-1.1.2-14.el7_1.noarch.rpm Red Hat Enterprise Linux ComputeNode Optional : Source: jakarta-taglibs-standard-1.1.2-14.el7_1.src.rpm noarch: jakarta-taglibs-standard-1.1.2-14.el7_1.noarch.rpm jakarta-taglibs-standard-javadoc-1.1.2-14.el7_1.noarch.rpm Red Hat Enterprise Linux Server : Source: jakarta-taglibs-standard-1.1.2-14.el7_1.src.rpm noarch: jakarta-taglibs-standard-1.1.2-14.el7_1.noarch.rpm Red Hat Enterprise Linux Server : Source: jakarta-taglibs-standard-1.1.2-14.ael7b_1.src.rpm noarch: jakarta-taglibs-standard-1.1.2-14.ael7b_1.noarch.rpm Red Hat Enterprise Linux Server Optional : Source: jakarta-taglibs-standard-1.1.2-14.el7_1.src.rpm noarch: jakarta-taglibs-standard-1.1.2-14.el7_1.noarch.rpm jakarta-taglibs-standard-javadoc-1.1.2-14.el7_1.noarch.rpm Red Hat Enterprise Linux Server Optional : noarch: jakarta-taglibs-standard-javadoc-1.1.2-14.ael7b_1.noarch.rpm Red Hat Enterprise Linux Workstation : Source: jakarta-taglibs-standard-1.1.2-14.el7_1.src.rpm noarch: jakarta-taglibs-standard-1.1.2-14.el7_1.noarch.rpm Red Hat Enterprise Linux Workstation Optional : noarch: jakarta-taglibs-standard-javadoc-1.1.2-14.el7_1.noarch.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2015-0254 https://access.redhat.com/security/updates/classification/#important