|The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a database and tools to fix them.|
OpenSSL: disclosure of ECDSA secret
Synthesis of the vulnerability
A local attacker can guess the ECDSA secret used by the OpenSSL implementation, in order to obtain sensitive information.
Vulnerable systems: Cisco ASR, Cisco ATA, Cisco ACE, ASA, AsyncOS, Cisco Catalyst, CiscoWorks, Cisco Content SMA, Cisco CSS, Cisco ESA, IOS by Cisco, IOS XE Cisco, IOS XR Cisco, Cisco IPS, IronPort Email, IronPort Management, IronPort Web, Nexus by Cisco, NX-OS, Prime Collaboration Assurance, Prime Collaboration Manager, Prime Infrastructure, Cisco PRSM, Cisco Router, Secure ACS, Cisco CUCM, Cisco Manager Attendant Console, Cisco Unified CCX, Cisco IP Phone, Cisco MeetingPlace, Cisco Wireless IP Phone, Cisco Unity ~ precise, WebNS, Cisco WSA, Debian, Avamar, EMC CAVA, EMC CEE, EMC CEPA, Celerra FAST, Celerra NS, Celerra NX4, EMC CMDCE, Connectrix Switch, ECC, NetWorker, PowerPath, Unisphere EMC, VNX Operating Environment, VNX Series, FreeBSD, HP-UX, AIX, Tivoli Workload Scheduler, WebSphere AS Traditional, WebSphere MQ, Juniper J-Series, Junos OS, Junos Pulse, Juniper Network Connect, Juniper UAC, McAfee Web Gateway, NetBSD, OpenSSL, openSUSE, openSUSE Leap, Solaris, pfSense, Polycom CMA, HDX, RealPresence Collaboration Server, Polycom VBP, ACE Agent, ACE Server, RSA Authentication Agent, RSA Authentication Manager, SecurID, Slackware, stunnel, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 1/4.
Consequences of a hack: data reading.
Pirate's origin: document.
Creation date: 21/03/2014.
Revision date: 05/06/2014.
Références of this weakness: 1673696, 1681249, 1688949, c04336637, CERTFR-2014-AVI-179, CERTFR-2014-AVI-253, CERTFR-2014-AVI-254, CERTFR-2014-AVI-255, CERTFR-2014-AVI-279, CERTFR-2014-AVI-286, cisco-sa-20140605-openssl, CVE-2014-0076, DOC-53313, DSA-2908-1, FreeBSD-SA-14:06.openssl, HPSBUX03046, JSA10629, MDVSA-2014:067, MDVSA-2015:062, NetBSD-SA2014-006, openSUSE-SU-2014:0480-1, openSUSE-SU-2016:0640-1, pfSense-SA-14_04.openssl, SA40006, SB10075, SSA:2014-098-01, SSRT101590, SUSE-SU-2014:0759-1, SUSE-SU-2014:0761-1, SUSE-SU-2014:0762-1, USN-2165-1, VIGILANCE-VUL-14462.
Description of the vulnerability
The ECDSA (Elliptic Curve Digital Signature Algorithm) algorithm uses a secret "k" value.
However, a local attacker can monitor the process linked to OpenSSL, and use the "FLUSH+RELOAD Cache" attack on a conditional branch (if), to obtain bit after bit the "k" secret value.
A local attacker can therefore guess the ECDSA secret used by the OpenSSL implementation, in order to obtain sensitive information.
Full Vigil@nce bulletin... (Free trial)
Computer vulnerabilities tracking service
Vigil@nce provides a network vulnerability alert. Each administrator can customize the list of products for which he wants to receive vulnerability alerts. The technology watch team tracks security threats targeting the computer system. The Vigil@nce computer vulnerability tracking service alerts your teams of vulnerabilities or threats impacting your information system.