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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3622 [SECURITY] [DLA 1932-1] openssl security update 26 September 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openssl Publisher: Debian Operating System: Debian GNU/Linux 8 Impact/Access: Access Privileged Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-1563 CVE-2019-1547 Reference: ESB-2019.3568 ESB-2019.3543.2 Original Bulletin: https://www.debian.org/lts/security/2019/dla-1932 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Package : openssl Version : 1.0.1t-1+deb8u12 CVE ID : CVE-2019-1547 CVE-2019-1563 Two security vulnerabilities were found in OpenSSL, the Secure Sockets Layer toolkit. CVE-2019-1547 Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. CVE-2019-1563 In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. For Debian 8 "Jessie", these problems have been fixed in version 1.0.1t-1+deb8u12. We recommend that you upgrade your openssl packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEErPPQiO8y7e9qGoNf2a0UuVE7UeQFAl2L4pJfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEFD RjNEMDg4RUYzMkVERUY2QTFBODM1RkQ5QUQxNEI5NTEzQjUxRTQACgkQ2a0UuVE7 UeQr5A//RW9tunRmRxsPPERNyfm1tD8vsSqZS2lEGh1f9ZuyMQQoR0t7BzWn0a+c RcDQtRe2iUtLYaX8PRvGQdWP7/0a/XWL6tqic6deQv+vnD/tZidc+WprvJ+ciNoG EBMfGafMQZ1nQ0lUth6A7wHtZNtyFUYsvvjS8hJ6CIdfpMBgofJX8ftYoaAhk5qC 3uvCk4gTE//Q6Ej4+fOwlrppbGqLvKGyEipK/OwK4X8xu7lVK4jINHN6mGG/Y8Co aiNGcICroqm6o4Yzwt+6vgUzTZwSt87EMJcU+1HrYJKWpFJgBUTcUlRUyAfFP/GG 9XV8UbmSrkK8mTEr0ebLj415PY7EnfGbSytbzpSBWYSS830mEWU38YlIdVuvSYm8 Ht/jSrnPHozvbrXUmZ1O9DCGgzjI4bYxUHNKzvdTTlkTtKLmPTAqkrNf29//NElF u3tU3WJXJPQzjK3bOR5IUXUFFQdTaI0Ntt4NZQYT0rRO4Q5bupGKpwpnZ2zBtp+q D5iuUXnKC9KsiALKat6Rl8P41Hae9NlslPN1PBDXCQm4QrrHvFJjEzHnGvy/aPju j8gm7EdVQj/a39Ftdlh58VwBf83PwuvwIRWe4ymlATnm+iswxcSNQBXQKPllvAed LwuaMne4b3G3rgvv+ku530h3itvXHj22yvpukBA/qbBjOVrtLz4= =RstY - -----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: 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). 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