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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.3799 OpenSSL vulnerabilities 7 December 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libssl1.0.0 Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Access Privileged Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-5407 CVE-2018-0735 CVE-2018-0734 Reference: ESB-2018.3786 ESB-2018.3545 Original Bulletin: http://www.ubuntu.com/usn/usn-3840-1 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3840-1 December 06, 2018 openssl, openssl1.0 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 18.10 - - Ubuntu 18.04 LTS - - Ubuntu 16.04 LTS - - Ubuntu 14.04 LTS Summary: Several security issues were fixed in OpenSSL. Software Description: - - openssl: Secure Socket Layer (SSL) cryptographic library and tools - - openssl1.0: Secure Socket Layer (SSL) cryptographic library and tools Details: Samuel Weiser discovered that OpenSSL incorrectly handled DSA signing. An attacker could possibly use this issue to perform a timing side-channel attack and recover private DSA keys. (CVE-2018-0734) Samuel Weiser discovered that OpenSSL incorrectly handled ECDSA signing. An attacker could possibly use this issue to perform a timing side-channel attack and recover private ECDSA keys. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-0735) Billy Bob Brumley, Cesar Pereida Garcia, Sohaib ul Hassan, Nicola Tuveri, and Alejandro Cabrera Aldaya discovered that Simultaneous Multithreading (SMT) architectures are vulnerable to side-channel leakage. This issue is known as "PortSmash". An attacker could possibly use this issue to perform a timing side-channel attack and recover private keys. (CVE-2018-5407) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.10: libssl1.0.0 1.0.2n-1ubuntu6.1 libssl1.1 1.1.1-1ubuntu2.1 Ubuntu 18.04 LTS: libssl1.0.0 1.0.2n-1ubuntu5.2 libssl1.1 1.1.0g-2ubuntu4.3 Ubuntu 16.04 LTS: libssl1.0.0 1.0.2g-1ubuntu4.14 Ubuntu 14.04 LTS: libssl1.0.0 1.0.1f-1ubuntu2.27 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://usn.ubuntu.com/usn/usn-3840-1 CVE-2018-0734, CVE-2018-0735, CVE-2018-5407 Package Information: https://launchpad.net/ubuntu/+source/openssl/1.1.1-1ubuntu2.1 https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu6.1 https://launchpad.net/ubuntu/+source/openssl/1.1.0g-2ubuntu4.3 https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu5.2 https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu4.14 https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.27 - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== 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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXAm5t2aOgq3Tt24GAQigew//cDhMc/swaUK1GxclyLyWNTz4hny8sW8k Au+3YOkxH1GUPXI8pul2cF4zIM/w6MPDu4Z5fOL+T4kZgzk/UJ7GF7V6j4l3bjNq yMz41PBSCWEFC4gxeO57/acEXzutZ5pgXP2N7uD0XJ4cSik2rQh5SJXwZ3r39n43 KbieCTVDvitQIvn75/ewMzx8PjJ72+rywrfwjHMWY2CQLsEs/ORpvQTc+RyR95oJ ZzEAcdyBeTf09J2b8GtgnLAm9xrEEg8oknubdU3IaFYPDzi+oEJuGUsID88lMSmC B38IyO4qhQjSeyYLsUTYtPQtNyonf2SvHpe26IOirtPjd9kM6IJITj1GNcYTzdI7 uKKLMOpNTF/QOmrBn6amDrROC34zP8L+84zw3aPm1hmQRbmXlmeHL1Y6TlcAkaV4 B14RySo2UulNZoU6dXYdRdGEd6PkprUQ1fqtWt3HFbkKGGaVPK8GBWArLJHGFdoa TWxMh97UnwD1gDvFjhWTQllgBktDeKy46KC5SlI9cjXG0H5Cs4uBJ0sifWGFYrDf m/TUFNMo/VayxWz8J4GLThyLQZr5vP3pUHMYx9F4k+l929FfQI53XHy/36oqtn6C +xEE4d0utVFdEA+6jZ+kwPaGVF92uvEPWr3m9u2Iv5bJkr0m/BCRUE5iCKEBp5w0 NDHmgY0V4/s= =Ee0T -----END PGP SIGNATURE-----