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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.0547 openssl security update 2 March 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openssl Publisher: Debian Operating System: Debian GNU/Linux 7 Debian GNU/Linux 8 Impact/Access: Access Privileged Data -- Existing Account Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2016-0799 CVE-2016-0798 CVE-2016-0797 CVE-2016-0705 CVE-2016-0702 Reference: ASB-2016.0004 ESB-2016.0544 ESB-2016.0543 ESB-2016.0542 ESB-2016.0539 Original Bulletin: http://www.debian.org/security/2016/dsa-3500 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-3500-1 security@debian.org https://www.debian.org/security/ Alessandro Ghedini March 01, 2016 https://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : openssl CVE ID : CVE-2016-0702 CVE-2016-0705 CVE-2016-0797 CVE-2016-0798 CVE-2016-0799 Several vulnerabilities were discovered in OpenSSL, a Secure Socket Layer toolkit. CVE-2016-0702 Yuval Yarom from the University of Adelaide and NICTA, Daniel Genkin from Technion and Tel Aviv University, and Nadia Heninger from the University of Pennsylvania discovered a side-channel attack which makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. This could allow local attackers to recover RSA private keys. CVE-2016-0705 Adam Langley from Google discovered a double free bug when parsing malformed DSA private keys. This could allow remote attackers to cause a denial of service or memory corruption in applications parsing DSA private keys received from untrusted sources. CVE-2016-0797 Guido Vranken discovered an integer overflow in the BN_hex2bn and BN_dec2bn functions that can lead to a NULL pointer dereference and heap corruption. This could allow remote attackers to cause a denial of service or memory corruption in applications processing hex or dec data received from untrusted sources. CVE-2016-0798 Emilia Käsper of the OpenSSL development team discovered a memory leak in the SRP database lookup code. To mitigate the memory leak, the seed handling in SRP_VBASE_get_by_user is now disabled even if the user has configured a seed. Applications are advised to migrate to the SRP_VBASE_get1_by_user function. CVE-2016-0799 Guido Vranken discovered an integer overflow in the BIO_*printf functions that could lead to an OOB read when printing very long strings. Additionally the internal doapr_outch function can attempt to write to an arbitrary memory location in the event of a memory allocation failure. These issues will only occur on platforms where sizeof(size_t) > sizeof(int) like many 64 bit systems. This could allow remote attackers to cause a denial of service or memory corruption in applications that pass large amounts of untrusted data to the BIO_*printf functions. Additionally the EXPORT and LOW ciphers were disabled since thay could be used as part of the DROWN (CVE-2016-0800) and SLOTH (CVE-2015-7575) attacks, but note that the oldstable (wheezye) and stable (jessie) distributions are not affected by those attacks since the SSLv2 protocol has already been dropped in the openssl package version 1.0.0c-2. For the oldstable distribution (wheezy), these problems have been fixed in version 1.0.1e-2+deb7u20. For the stable distribution (jessie), these problems have been fixed in version 1.0.1k-3+deb8u4. For the unstable distribution (sid), these problems will be fixed shortly. We recommend that you upgrade your openssl packages. Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org - -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCgAGBQJW1ah7AAoJEK+lG9bN5XPLwZAQAIC8QcmipL7pZmkkn2k3w0w2 HvaHZEFOnbMXLRqKquu1L+RC57TemNqVZ/0kH4qlrXZs5W+Y2ZAEcvBCFEC8OFEJ yuz6GPnmZLqNeIIrnlJS4p9JiB06KEfadwACm4+y8YcWde8651CYavbZzlJAybOk K48rdvG5A1h0VGaz9PUSdfMmesnHyJCixSANOSmgZ6i9FKLMLuU/+bZu4hHOwnWl e4oHFv4XEvc2C5CxKiDDVhIu5J+Mx2lnFXQ+DBcau0JNqphx2zCulM6+ZLDMGK4P LrxLf0IuLpQ+s5CNhiOttkP3XgCaC8iMSOXx1cOx73qRRDki5MnQuCu7t5WYMuw7 vXDWdCq8uqukXF3H0pZWGieOIa1v1cqocWZa+eH2Al5nIET3593ARgDXV+XzosUX 3cYMMh7dsJWFpaGFgnhpsE80843aE8Q4eVFAjLw83nBTtyg5hJ2qEqGs5L/gLUXR 4F+eKBLnEn79LwC5XeLq0N5o7xCnYlpuMluOH/AQi+AHF29Z1UQ7ZmMkR/iqvt0D J+8MzDfwnlUqZrvSNgrQvIBI+Lu7cxdm8B1GSD/nUqiQDV4CHe2tc++Wfbqgl4F9 LrHZWA/j1wGuGMT/vDjXQWRSl8lIhRvAMm/FMoyBiGndNTh5TK5I9Tykazb/xp++ kW1cZiPsdcvSgmhPVjD7 =nYQh - -----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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVtZFTX6ZAP0PgtI9AQKjeQ//Tr4mxBQ9+C4fs1ZuKV5D67ZGPgtmPDRz DQG8JZi+5cpErhps/k/kB61K55oVUdWzQqDhmoa7rfFOUlmfWQ2GrTQpp5SiQGYf ISr2NSSW61b+6+L8kHchlxYa7pbbIvuSwfnexuDYW40GLF+qieK5lGZqoR/U4ULn Qs+RwwGxG1hkNwG4GxawyURbhkP+Hyqx0v9SICzfjIpIIpkOALb9ypKtaGEhouPi e1XiEh6ry8mnj+BUODZU1NwXuGZHWstOv4vbeJnBCckNp5MhO/3bLHyo5SIQSLQR Co63oJ0WLUjLQTmV7+JvRBBXw/Cb6+Ia/7k3O42IAIVFB7ZtmQBls8qO56I6fovE +r9COBxORP33u/25xMn3+i/vbzhG3LOJONDlx+JvhPMp+bMVHJ/VKdhCCAhVyeTt uw40ti/hCgdhkymct5l41x3X/itx2ZXnevRHJfsVQRQba5NR/efhu9D16NBoK3Jc //gw+d8ND5EViGHRsilkpfq9Cw8gJNwFMb7diXqtM2qnoS4iPOEO0LcBlejHzl3V 4meT3dABJNRReCPCf1cl/CSLMadONdq1V2V60fmbx3NoLc6SntgsHCCD/oL1rJkA O81vgJYq7DAKt7PYsHDL1/yG4HxFSdzsvfQQ+PgewHdf9bACBBd/8QCBN//TkmTz QfAQwCScbkU= =pXFE -----END PGP SIGNATURE-----