PT-2011-1189 · Openssl · Openssl
Published
2011-05-31
·
Updated
2014-10-24
·
CVE-2011-1945
CVSS v2.0
7.5
High
| Vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Name of the Vulnerable Software and Affected Versions
OpenSSL versions prior to 1.0.0j
OpenSSL versions prior to 0.9.8y
Description
The issue affects the OpenSSL package in Gentoo Linux, potentially leading to breaches of confidentiality, integrity, and availability of protected information. Exploitation can be done remotely. Specifically, the elliptic curve cryptography (ECC) subsystem in OpenSSL does not properly implement curves over binary fields when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE ECDSA cipher suite. This makes it easier for attackers to determine private keys via a timing attack and a lattice calculation.
Recommendations
For versions prior to 1.0.0j, update to version 1.0.0j or later.
For versions prior to 0.9.8y, update to version 0.9.8y or later.
As a temporary workaround, consider restricting the use of the ECDHE ECDSA cipher suite until a patch is available.
Exploit
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Openssl