CVE-2011-1945

LOW

Description

The elliptic curve cryptography (ECC) subsystem in OpenSSL 1.0.0d and earlier, when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE_ECDSA cipher suite, does not properly implement curves over binary fields, which makes it easier for context-dependent attackers to determine private keys via a timing attack and a lattice calculation.

References

http://eprint.iacr.org/2011/232.pdf

http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html

http://secunia.com/advisories/44935

http://support.apple.com/kb/HT5784

http://www.debian.org/security/2011/dsa-2309

http://www.kb.cert.org/vuls/id/536044

http://www.kb.cert.org/vuls/id/MAPG-8FENZ3

http://www.mandriva.com/security/advisories?name=MDVSA-2011:136

http://www.mandriva.com/security/advisories?name=MDVSA-2011:137

https://hermes.opensuse.org/messages/8760466

https://hermes.opensuse.org/messages/8764170

Details

Source: MITRE

Published: 2011-05-31

Updated: 2013-06-06

Type: CWE-310

Risk Information

CVSS v2.0

Base Score: 2.6

Vector: AV:N/AC:H/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 4.9

Severity: LOW