ID

VAR-201711-0007

CVE

CVE-2016-8610

TITLE

OpenSSL Resource Management Error Vulnerability

DESCRIPTION

A denial of service flaw was found in OpenSSL 0.9.8, 1.0.1, 1.0.2 through 1.0.2h, and 1.1.0 in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections from other clients. OpenSSL is prone to denial-of-service vulnerability. Successful exploitation of the issue will cause excessive memory or CPU resource consumption, resulting in a denial-of-service condition. It supports a variety of encryption algorithms, including symmetric ciphers, hash algorithms, security hashing algorithm, etc. The following versions are affected: OpenSSL version 0.9.8, version 1.0.1, versions 1.0.2 through 1.0.2h, version 1.1.0. Description: OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies. The updates are documented in the Release Notes document linked to in the References. 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. Solution: Before applying the update, back up your existing Red Hat JBoss Web Server installation (including all applications and configuration files). -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: Red Hat JBoss Core Services Apache HTTP Server 2.4.23 Service Pack 1 for RHEL 6 Advisory ID: RHSA-2017:1414-01 Product: Red Hat JBoss Core Services Advisory URL: https://access.redhat.com/errata/RHSA-2017:1414 Issue date: 2017-06-07 CVE Names: CVE-2016-0736 CVE-2016-2161 CVE-2016-6304 CVE-2016-7056 CVE-2016-8610 CVE-2016-8740 CVE-2016-8743 ===================================================================== 1. Summary: An update is now available for Red Hat JBoss Core Services on RHEL 6. 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 JBoss Core Services on RHEL 6 Server - i386, noarch, ppc64, x86_64 3. Description: Red Hat JBoss Core Services is a set of supplementary software for Red Hat JBoss middleware products. This software, such as Apache HTTP Server, is common to multiple JBoss middleware products, and is packaged under Red Hat JBoss Core Services to allow for faster distribution of updates, and for a more consistent update experience. This release of Red Hat JBoss Core Services Apache HTTP Server 2.4.23 Service Pack 1 serves as a replacement for Red Hat JBoss Core Services Apache HTTP Server 2.4.23, and includes bug fixes, which are documented in the Release Notes document linked to in the References. Security Fix(es): * A memory leak flaw was found in the way OpenSSL handled TLS status request extension data during session renegotiation. A remote attacker could cause a TLS server using OpenSSL to consume an excessive amount of memory and, possibly, exit unexpectedly after exhausting all available memory, if it enabled OCSP stapling support. (CVE-2016-6304) * It was discovered that the mod_session_crypto module of httpd did not use any mechanisms to verify integrity of the encrypted session data stored in the user's browser. (CVE-2016-0736) * It was discovered that the mod_auth_digest module of httpd did not properly check for memory allocation failures. (CVE-2016-2161) * A timing attack flaw was found in OpenSSL that could allow a malicious user with local access to recover ECDSA P-256 private keys. (CVE-2016-8610) * It was discovered that the HTTP parser in httpd incorrectly allowed certain characters not permitted by the HTTP protocol specification to appear unencoded in HTTP request headers. If httpd was used in conjunction with a proxy or backend server that interpreted those characters differently, a remote attacker could possibly use this flaw to inject data into HTTP responses, resulting in proxy cache poisoning. (CVE-2016-8743) * A vulnerability was found in httpd's handling of the LimitRequestFields directive in mod_http2, affecting servers with HTTP/2 enabled. An attacker could send crafted requests with headers larger than the server's available memory, causing httpd to crash. (CVE-2016-8740) Red Hat would like to thank the OpenSSL project for reporting CVE-2016-6304 and Shi Lei (Gear Team of Qihoo 360 Inc.) for reporting CVE-2016-8610. Upstream acknowledges Shi Lei (Gear Team of Qihoo 360 Inc.) as the original reporter of CVE-2016-6304. 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 For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted. After installing the updated packages, the httpd daemon will be restarted automatically. 5. Bugs fixed (https://bugzilla.redhat.com/): 1377600 - CVE-2016-6304 openssl: OCSP Status Request extension unbounded memory growth 1384743 - CVE-2016-8610 SSL/TLS: Malformed plain-text ALERT packets could cause remote DoS 1401528 - CVE-2016-8740 httpd: Incomplete handling of LimitRequestFields directive in mod_http2 1406744 - CVE-2016-0736 httpd: Padding Oracle in Apache mod_session_crypto 1406753 - CVE-2016-2161 httpd: DoS vulnerability in mod_auth_digest 1406822 - CVE-2016-8743 httpd: Apache HTTP Request Parsing Whitespace Defects 1412120 - CVE-2016-7056 openssl: ECDSA P-256 timing attack key recovery 6. JIRA issues fixed (https://issues.jboss.org/): JBCS-318 - Errata for httpd 2.4.23 SP1 RHEL 6 7. Package List: Red Hat JBoss Core Services on RHEL 6 Server: Source: jbcs-httpd24-httpd-2.4.23-120.jbcs.el6.src.rpm jbcs-httpd24-mod_security-2.9.1-19.GA.jbcs.el6.src.rpm jbcs-httpd24-openssl-1.0.2h-13.jbcs.el6.src.rpm i386: jbcs-httpd24-httpd-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-httpd-debuginfo-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-httpd-devel-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-httpd-libs-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-httpd-selinux-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-httpd-tools-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-mod_ldap-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-mod_proxy_html-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-mod_security-2.9.1-19.GA.jbcs.el6.i686.rpm jbcs-httpd24-mod_security-debuginfo-2.9.1-19.GA.jbcs.el6.i686.rpm jbcs-httpd24-mod_session-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-mod_ssl-2.4.23-120.jbcs.el6.i686.rpm jbcs-httpd24-openssl-1.0.2h-13.jbcs.el6.i686.rpm jbcs-httpd24-openssl-debuginfo-1.0.2h-13.jbcs.el6.i686.rpm jbcs-httpd24-openssl-devel-1.0.2h-13.jbcs.el6.i686.rpm jbcs-httpd24-openssl-libs-1.0.2h-13.jbcs.el6.i686.rpm jbcs-httpd24-openssl-perl-1.0.2h-13.jbcs.el6.i686.rpm jbcs-httpd24-openssl-static-1.0.2h-13.jbcs.el6.i686.rpm noarch: jbcs-httpd24-httpd-manual-2.4.23-120.jbcs.el6.noarch.rpm ppc64: jbcs-httpd24-httpd-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-httpd-debuginfo-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-httpd-devel-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-httpd-libs-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-httpd-selinux-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-httpd-tools-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-mod_ldap-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-mod_proxy_html-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-mod_security-2.9.1-19.GA.jbcs.el6.ppc64.rpm jbcs-httpd24-mod_security-debuginfo-2.9.1-19.GA.jbcs.el6.ppc64.rpm jbcs-httpd24-mod_session-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-mod_ssl-2.4.23-120.jbcs.el6.ppc64.rpm jbcs-httpd24-openssl-1.0.2h-13.jbcs.el6.ppc64.rpm jbcs-httpd24-openssl-debuginfo-1.0.2h-13.jbcs.el6.ppc64.rpm jbcs-httpd24-openssl-devel-1.0.2h-13.jbcs.el6.ppc64.rpm jbcs-httpd24-openssl-libs-1.0.2h-13.jbcs.el6.ppc64.rpm jbcs-httpd24-openssl-perl-1.0.2h-13.jbcs.el6.ppc64.rpm jbcs-httpd24-openssl-static-1.0.2h-13.jbcs.el6.ppc64.rpm x86_64: jbcs-httpd24-httpd-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-httpd-debuginfo-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-httpd-devel-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-httpd-libs-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-httpd-selinux-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-httpd-tools-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-mod_ldap-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-mod_proxy_html-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-mod_security-2.9.1-19.GA.jbcs.el6.x86_64.rpm jbcs-httpd24-mod_security-debuginfo-2.9.1-19.GA.jbcs.el6.x86_64.rpm jbcs-httpd24-mod_session-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-mod_ssl-2.4.23-120.jbcs.el6.x86_64.rpm jbcs-httpd24-openssl-1.0.2h-13.jbcs.el6.x86_64.rpm jbcs-httpd24-openssl-debuginfo-1.0.2h-13.jbcs.el6.x86_64.rpm jbcs-httpd24-openssl-devel-1.0.2h-13.jbcs.el6.x86_64.rpm jbcs-httpd24-openssl-libs-1.0.2h-13.jbcs.el6.x86_64.rpm jbcs-httpd24-openssl-perl-1.0.2h-13.jbcs.el6.x86_64.rpm jbcs-httpd24-openssl-static-1.0.2h-13.jbcs.el6.x86_64.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/ 8. References: https://access.redhat.com/security/cve/CVE-2016-0736 https://access.redhat.com/security/cve/CVE-2016-2161 https://access.redhat.com/security/cve/CVE-2016-6304 https://access.redhat.com/security/cve/CVE-2016-7056 https://access.redhat.com/security/cve/CVE-2016-8610 https://access.redhat.com/security/cve/CVE-2016-8740 https://access.redhat.com/security/cve/CVE-2016-8743 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/documentation/en/red-hat-jboss-core-services/ 9. 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 iD8DBQFZOEFRXlSAg2UNWIIRArPwAJ9m6v5fPuR/bqB0iCR7mZf0eNlupgCeOFGA eLS32IrqnsIU/hS41jk8+F0= =4Ffz -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . The References section of this erratum contains a download link (you must log in to download the update). This release includes bug fixes as well as a new release of OpenSSL. The JBoss server process must be restarted for the update to take effect. (CVE-2016-6304) * It was discovered that OpenSSL did not always use constant time operations when computing Digital Signature Algorithm (DSA) signatures. (CVE-2016-8610) * Multiple integer overflow flaws were found in the way OpenSSL performed pointer arithmetic. =========================================================================== Ubuntu Security Notice USN-3183-2 March 20, 2017 gnutls26 vulnerability =========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS Summary: GnuTLS could be made to hang if it received specially crafted network traffic. Software Description: - gnutls26: GNU TLS library Details: USN-3183-1 fixed CVE-2016-8610 in GnuTLS in Ubuntu 16.04 LTS and Ubuntu 16.10. This update provides the corresponding update for Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. Original advisory details: Stefan Buehler discovered that GnuTLS incorrectly verified the serial length of OCSP responses. This issue only applied to Ubuntu 16.04 LTS. (CVE-2016-7444) Shi Lei discovered that GnuTLS incorrectly handled certain warning alerts. This issue has only been addressed in Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-8610) It was discovered that GnuTLS incorrectly decoded X.509 certificates with a Proxy Certificate Information extension. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-5334) It was discovered that GnuTLS incorrectly handled certain OpenPGP certificates. (CVE-2017-5335, CVE-2017-5336, CVE-2017-5337) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: libgnutls26 2.12.23-12ubuntu2.7 Ubuntu 12.04 LTS: libgnutls26 2.12.14-5ubuntu3.14 In general, a standard system update will make all the necessary changes

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

resource management error

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Shi Lei from Gear Team, Qihoo 360 Inc.

SOURCES

LAST UPDATE DATE

2026-04-18T20:02:56.350000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE