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Category:   Application (Web Server/CGI)  >   Apache Tomcat Vendors:   Apache Software Foundation
(Oracle Issues Fix for Oracle Linux) Apache Tomcat Overflow in UTF-8 Decoder Lets Remote Users Deny Service
SecurityTracker Alert ID:  1041885
SecurityTracker URL:  http://securitytracker.com/id/1041885
CVE Reference:   CVE-2018-1336   (Links to External Site)
Date:  Oct 16 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 7.0.28 to 7.0.88, 8.0.0.RC1 to 8.0.51, 8.5.0 to 8.5.30, 9.0.0.M1 to 9.0.7
Description:   A vulnerability was reported in Apache Tomcat. A remote user can cause denial of service conditions on the target system.

A remote user can send specially crafted data containing supplementary characters to trigger an overflow in the UTF-8 decoder and cause the target service to enter an infinite loop.

Impact:   A remote user can cause the target service to enter an infinite loop.
Solution:   Oracle has issued a fix.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2018-2921.html

Vendor URL:  linux.oracle.com/errata/ELSA-2018-2921.html (Links to External Site)
Cause:   Boundary error, State error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  7

Message History:   This archive entry is a follow-up to the message listed below.
Jul 26 2018 Apache Tomcat Overflow in UTF-8 Decoder Lets Remote Users Deny Service



 Source Message Contents

Subject:  [El-errata] ELSA-2018-2921 Important: Oracle Linux 7 tomcat security update

Oracle Linux Security Advisory ELSA-2018-2921

http://linux.oracle.com/errata/ELSA-2018-2921.html

The following updated rpms for Oracle Linux 7 have been uploaded to the 
Unbreakable Linux Network:

x86_64:
tomcat-7.0.76-8.el7_5.noarch.rpm
tomcat-admin-webapps-7.0.76-8.el7_5.noarch.rpm
tomcat-docs-webapp-7.0.76-8.el7_5.noarch.rpm
tomcat-el-2.2-api-7.0.76-8.el7_5.noarch.rpm
tomcat-javadoc-7.0.76-8.el7_5.noarch.rpm
tomcat-jsp-2.2-api-7.0.76-8.el7_5.noarch.rpm
tomcat-jsvc-7.0.76-8.el7_5.noarch.rpm
tomcat-lib-7.0.76-8.el7_5.noarch.rpm
tomcat-servlet-3.0-api-7.0.76-8.el7_5.noarch.rpm
tomcat-webapps-7.0.76-8.el7_5.noarch.rpm


SRPMS:
http://oss.oracle.com/ol7/SRPMS-updates/tomcat-7.0.76-8.el7_5.src.rpm



Description of changes:

[0:7.0.76-8]
- Resolves: rhbz#1608608 CVE-2018-1336 tomcat: A bug in the UTF 8 
decoder can lead to DoS


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