ID

VAR-201704-1589

CVE

CVE-2017-5645

TITLE

Apache Log4j Vulnerable to unreliable data deserialization

DESCRIPTION

In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code. Apache Log4j Contains a vulnerability in the deserialization of unreliable data.Information is obtained, information is altered, and service operation is disrupted (DoS) An attack may be carried out. Apache Log4j is a Java-based open source logging tool developed by the Apache Software Foundation. A code issue vulnerability exists in Apache Log4j 2.x versions prior to 2.8.2. An attacker could exploit this vulnerability to execute arbitrary code. (CVE-2017-5645) * A vulnerability was found in Jasypt that would allow an attacker to perform a timing attack on password hash comparison. (CVE-2014-9970) * It was found that an information disclosure flaw in Bouncy Castle could enable a local malicious application to gain access to user's private information. (CVE-2015-6644) * It was found that while parsing the SAML messages the StaxParserUtil class of Picketlink replaces special strings for obtaining attribute values with system property. This could allow an attacker to determine values of system properties at the attacked system by formatting the SAML request ID field to be the chosen system property which could be obtained in the "InResponseTo" field in the response. (CVE-2017-2582) * It was found that when the security manager's reflective permissions, which allows it to access the private members of the class, are granted to Hibernate Validator, a potential privilege escalation can occur. By allowing the calling code to access those private members without the permission an attacker may be able to validate an invalid instance and access the private member value via ConstraintViolation#getInvalidValue(). The References section of this erratum contains a download link (you must log in to download the update). Description: Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache HTTP Server, the Apache Tomcat Servlet container, Apache Tomcat Connector (mod_jk), JBoss HTTP Connector (mod_cluster), Hibernate, and the Tomcat Native library. This release of Red Hat JBoss Web Server 3.1 Service Pack 1 serves as a replacement for Red Hat JBoss Web Server 3.1, and includes bug fixes, which are documented in the Release Notes document linked to in the References. (CVE-2017-5645) * A vulnerability was discovered in tomcat's handling of pipelined requests when "Sendfile" was used. If sendfile processing completed quickly, it was possible for the Processor to be added to the processor cache twice. This could lead to invalid responses or information disclosure. (CVE-2017-5647) * A vulnerability was discovered in the error page mechanism in Tomcat's DefaultServlet implementation. A crafted HTTP request could cause undesired side effects, possibly including the removal or replacement of the custom error page. (CVE-2017-5664) * A vulnerability was discovered in tomcat. When running an untrusted application under a SecurityManager it was possible, under some circumstances, for that application to retain references to the request or response objects and thereby access and/or modify information associated with another web application. (CVE-2017-5648) 4. Solution: Before applying the update, back up your existing Red Hat JBoss Web Server installation (including all applications and configuration files). Bugs fixed (https://bugzilla.redhat.com/): 1441205 - CVE-2017-5647 tomcat: Incorrect handling of pipelined requests when send file was used 1441223 - CVE-2017-5648 tomcat: Calls to application listeners did not use the appropriate facade object 1443635 - CVE-2017-5645 log4j: Socket receiver deserialization vulnerability 1459158 - CVE-2017-5664 tomcat: Security constrained bypass in error page mechanism 6. JIRA issues fixed (https://issues.jboss.org/): JWS-657 - tomcat-native installs RHEL apr in addition to jbcs-httpd24-httpd-libs JWS-667 - Subject incorrectly removed from user session JWS-695 - tomcat7_t and tomcat8_t domains are in unconfined_domain JWS-709 - RPM missing selinux-policy dependency JWS-716 - Backport 60087 for Tomcat 8 JWS-717 - RFC 7230/3986 url requirement that prevents unencoded curly braces should be optional, since it breaks existing sites JWS-721 - CORS filter Vary header missing JWS-725 - /usr/share/tomcat7 needs world execute permissions to function on openshift v2 JWS-741 - Configurations in conf.d are not applied JWS-760 - [ASF BZ 59961] Provide an option to enable/disable processing of Class-Path entry in a jar's manifest file 7. The purpose of this text-only errata is to inform you about the security issues fixed in this release. Security Fix(es): * bsh2: remote code execution via deserialization (CVE-2016-2510) * log4j: Socket receiver deserialization vulnerability (CVE-2017-5645) * uima: XML external entity expansion (XXE) can allow attackers to execute arbitrary code (CVE-2017-15691) * mysql-connector-java: Connector/J unspecified vulnerability (CPU October 2018) (CVE-2018-3258) * thrift: Improper Access Control grants access to files outside the webservers docroot path (CVE-2018-11798) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Installation instructions are available from the Fuse 7.3.0 product documentation page: https://access.redhat.com/documentation/en-us/red_hat_fuse/7.3/ 4. Bugs fixed (https://bugzilla.redhat.com/): 1310647 - CVE-2016-2510 bsh2: remote code execution via deserialization 1443635 - CVE-2017-5645 log4j: Socket receiver deserialization vulnerability 1572463 - CVE-2017-15691 uima: XML external entity expansion (XXE) can allow attackers to execute arbitrary code 1640615 - CVE-2018-3258 mysql-connector-java: Connector/J unspecified vulnerability (CPU October 2018) 1667188 - CVE-2018-11798 thrift: Improper Access Control grants access to files outside the webservers docroot path 5. (CVE-2017-7525) Red Hat would like to thank Liao Xinxi (NSFOCUS) for reporting CVE-2017-7525. (CVE-2017-5645) * It was found that XStream contains a vulnerability that allows a maliciously crafted file to be parsed successfully which could cause an application crash. The crash occurs if the file that is being fed into XStream input stream contains an instances of the primitive type 'void'. An attacker could use this flaw to create a denial of service on the target system. (CVE-2017-7957) 3. It is recommended to halt the server by stopping the JBoss Application Server process before installing this update; after installing the update, restart the server by starting the JBoss Application Server process. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: log4j security update Advisory ID: RHSA-2017:2423-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2017:2423 Issue date: 2017-08-07 CVE Names: CVE-2017-5645 ===================================================================== 1. Summary: An update for log4j is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - noarch Red Hat Enterprise Linux Client Optional (v. 7) - noarch Red Hat Enterprise Linux ComputeNode (v. 7) - noarch Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch Red Hat Enterprise Linux Server (v. 7) - noarch Red Hat Enterprise Linux Server Optional (v. 7) - noarch Red Hat Enterprise Linux Workstation (v. 7) - noarch Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch 3. Description: Log4j is a tool to help the programmer output log statements to a variety of output targets. (CVE-2017-5645) 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1443635 - CVE-2017-5645 log4j: Socket receiver deserialization vulnerability 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: log4j-1.2.17-16.el7_4.src.rpm noarch: log4j-1.2.17-16.el7_4.noarch.rpm Red Hat Enterprise Linux Client Optional (v. 7): noarch: log4j-javadoc-1.2.17-16.el7_4.noarch.rpm log4j-manual-1.2.17-16.el7_4.noarch.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: log4j-1.2.17-16.el7_4.src.rpm noarch: log4j-1.2.17-16.el7_4.noarch.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): noarch: log4j-javadoc-1.2.17-16.el7_4.noarch.rpm log4j-manual-1.2.17-16.el7_4.noarch.rpm Red Hat Enterprise Linux Server (v. 7): Source: log4j-1.2.17-16.el7_4.src.rpm noarch: log4j-1.2.17-16.el7_4.noarch.rpm Red Hat Enterprise Linux Server Optional (v. 7): noarch: log4j-javadoc-1.2.17-16.el7_4.noarch.rpm log4j-manual-1.2.17-16.el7_4.noarch.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: log4j-1.2.17-16.el7_4.src.rpm noarch: log4j-1.2.17-16.el7_4.noarch.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): noarch: log4j-javadoc-1.2.17-16.el7_4.noarch.rpm log4j-manual-1.2.17-16.el7_4.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-2017-5645 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFZiCjVXlSAg2UNWIIRAgugAKCX6snTYMAdTmkK1uQ86MGQhkv7ugCdFILV uCPrjfU5EG2L7kIu/w1uCSA= =Fxz+ -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

arbitrary

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2026-02-08T20:01:08.514000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE