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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2764 Moderate: libreswan security and enhancement update 5 November 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libreswan Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 7 Red Hat Enterprise Linux WS/Desktop 7 Linux variants Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-3240 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2015-1979.html Comment: This advisory references vulnerabilities in products which run on platforms other than Red Hat. It is recommended that administrators running libreswan check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: libreswan security and enhancement update Advisory ID: RHSA-2015:1979-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1979.html Issue date: 2015-11-03 Updated on: 2015-11-04 CVE Names: CVE-2015-3240 ===================================================================== 1. Summary: Updated libreswan packages that fix one security issue, several bugs, and add several enhancements are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 3. Description: Libreswan is an implementation of IPsec & IKE for Linux. IPsec is the Internet Protocol Security and uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks such as virtual private network (VPN). A flaw was discovered in the way Libreswan's IKE daemon processed IKE KE payloads. A remote attacker could send specially crafted IKE payload with a KE payload of g^x=0 that, when processed, would lead to a denial of service (daemon crash). (CVE-2015-3240) This issue was discovered by Paul Wouters of Red Hat. Note: Please note that when upgrading from an earlier version of Libreswan, the existing CA certificates in the /etc/ipsec.d/cacerts/ directory and the existing certificate revocation list (CRL) files from the /etc/ipsec.d/crls/ directory are automatically imported into the NSS database. Once completed, these directories are no longer used by Libreswan. To install new CA certificates or new CRLS, the certutil and crlutil commands must be used to import these directly into the Network Security Services (NSS) database. This update also adds the following enhancements: * This update adds support for RFC 7383 IKEv2 Fragmentation, RFC 7619 Auth Null and ID Null, INVALID_KE renegotiation, CRL and OCSP support via NSS, AES_CTR and AES_GCM support for IKEv2, CAVS testing for FIPS compliance. In addition, this update enforces FIPS algorithms restrictions in FIPS mode, and runs Composite Application Validation System (CAVS) testing for FIPS compliance during package build. A new Cryptographic Algorithm Validation Program (CAVP) binary can be used to re-run the CAVS tests at any time. Regardless of FIPS mode, the pluto daemon runs RFC test vectors for various algorithms. Furthermore, compiling on all architectures now enables the "-Werror" GCC option, which enhances the security by making all warnings into errors. (BZ#1263346) * This update also fixes several memory leaks and introduces a sub-second packet retransmit option. (BZ#1268773) * This update improves migration support from Openswan to Libreswan. Specifically, all Openswan options that can take a time value without a suffix are now supported, and several new keywords for use in the /etc/ipsec.conf file have been introduced. See the relevant man pages for details. (BZ#1268775) * With this update, loopback support via the "loopback=" option has been deprecated. (BZ#1270673) All Libreswan users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add these enhancements. 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 (https://bugzilla.redhat.com/): 1232320 - CVE-2015-3240 libreswan / openswan: denial of service via IKE daemon restart when receiving a bad DH gx value 1268775 - libreswan should support strictcrlpolicy alias for crl-strict= option to support openswan migration 1273719 - libreswan FIPS test mistakenly looks for non-existent file hashes and reports FIPS failure 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: libreswan-3.15-5.el7_1.src.rpm x86_64: libreswan-3.15-5.el7_1.x86_64.rpm libreswan-debuginfo-3.15-5.el7_1.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: libreswan-3.15-5.el7_1.src.rpm ppc64: libreswan-3.15-5.el7_1.ppc64.rpm libreswan-debuginfo-3.15-5.el7_1.ppc64.rpm s390x: libreswan-3.15-5.el7_1.s390x.rpm libreswan-debuginfo-3.15-5.el7_1.s390x.rpm x86_64: libreswan-3.15-5.el7_1.x86_64.rpm libreswan-debuginfo-3.15-5.el7_1.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: libreswan-3.15-5.ael7b_1.src.rpm ppc64le: libreswan-3.15-5.ael7b_1.ppc64le.rpm libreswan-debuginfo-3.15-5.ael7b_1.ppc64le.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: libreswan-3.15-5.el7_1.src.rpm x86_64: libreswan-3.15-5.el7_1.x86_64.rpm libreswan-debuginfo-3.15-5.el7_1.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/ 7. References: https://access.redhat.com/security/cve/CVE-2015-3240 https://access.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2015 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFWOdPOXlSAg2UNWIIRAiKKAJ4mYauGJ2rGPErRG2dtvCxfRVVwCQCfZhWH DObTsXqNhqzIxScg4jVBAM8= =Xk6n - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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