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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1671 Libgcrypt vulnerabilities 4 July 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libgcrypt20 Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Access Privileged Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-9526 CVE-2017-7526 Reference: ESB-2017.1659 ESB-2017.1492 Original Bulletin: http://www.ubuntu.com/usn/usn-3347-1 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3347-1 July 03, 2017 libgcrypt11, libgcrypt20 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 17.04 - - Ubuntu 16.10 - - Ubuntu 16.04 LTS - - Ubuntu 14.04 LTS Summary: Several security issues were fixed in Libgcrypt. Software Description: - - libgcrypt20: LGPL Crypto library - - libgcrypt11: LGPL Crypto library Details: Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal, and Yuval Yarom discovered that Libgcrypt was susceptible to an attack via side channels. A local attacker could use this attack to recover RSA private keys. (CVE-2017-7526) It was discovered that Libgcrypt was susceptible to an attack via side channels. A local attacker could use this attack to possibly recover EdDSA private keys. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-9526) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.04: libgcrypt20 1.7.6-1ubuntu0.1 Ubuntu 16.10: libgcrypt20 1.7.2-2ubuntu1.1 Ubuntu 16.04 LTS: libgcrypt20 1.6.5-2ubuntu0.3 Ubuntu 14.04 LTS: libgcrypt11 1.5.3-2ubuntu4.5 In general, a standard system update will make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3347-1 CVE-2017-7526, CVE-2017-9526 Package Information: https://launchpad.net/ubuntu/+source/libgcrypt20/1.7.6-1ubuntu0.1 https://launchpad.net/ubuntu/+source/libgcrypt20/1.7.2-2ubuntu1.1 https://launchpad.net/ubuntu/+source/libgcrypt20/1.6.5-2ubuntu0.3 https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.3-2ubuntu4.5 - --------------------------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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWVrVX4x+lLeg9Ub1AQh/mRAAlv0X9GU1pEgjowehpwpDrlE56KLOQjKc ut/2ZTznKA6DwnfZaGr65rMKSq1Ej8ChCxVbCInLlSnrPt/3soaEm5ihJlRpY4Cg yLvVbIoRvHe6uGVKPzURw/53DlcdoW7y0XZwyGx6SnhGCNB0cNtdxCOr+JaNDTUd MFvOJIYSsKTe7tAjEgEHZbVp5JbbKEtmsWTg3bDMW7EirvvlICAlIiHENBlkZjmX eBs8kNGkMoaoT2xj0DZVAXJkMHZPwkGb+SJhM01PS6j8lAswtTa7iC5+NWwtQt/l P3AbZ3hlDSzldOBysBhp76jsA22+ov3CKgm4m/Awz9E2U+SOiYT76OlN+us7c5LK t4+fOmS6UmIoZRko76dXOBEbEHqQBSGPsKkPcZdywaXUgHfmOSNUGCkYPtt6hwcb 2U7ShDwuwtxnzydqSL2XlYhAd18zzBClRvsKC8m9Bc+4SMWCBTtMvj2on2BhPfKp WXuOQLX2nojWHh/WaQQ0n3b+oJQb0HEHy5aMONWOHBDbQFZjtUkyWSFC4ZQ/xPTu v3w/NWutyhR+j9WqvWV23AUeNTDP6bLFmLdCaAqJ+T27bhECErDP29/QhUSwB5HC rEEkdYNPiN+8UrIvsYykPqDhexqIe6KVHl2OzJVILZMrfDdflRnEvObrWRimdDZN raMGeoqnydc= =APYY -----END PGP SIGNATURE-----