Vulnerability Details : CVE-2011-4354
crypto/bn/bn_nist.c in OpenSSL before 0.9.8h on 32-bit platforms, as used in stunnel and other products, in certain circumstances involving ECDH or ECDHE cipher suites, uses an incorrect modular reduction algorithm in its implementation of the P-256 and P-384 NIST elliptic curves, which allows remote attackers to obtain the private key of a TLS server via multiple handshake attempts.
Products affected by CVE-2011-4354
- cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.8:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.8a:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.2b:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.3:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.5a:beta1:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.5a:beta2:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6:beta3:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6g:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6d:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6k:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7:beta2:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7m:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7c:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7h:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.8b:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.8c:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.3a:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.4:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6a:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6a:beta1:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6f:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.8f:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.1c:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.5:beta2:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.5a:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6:beta1:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6:beta2:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6b:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6e:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7:beta3:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7e:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7b:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7k:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7l:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6i:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6j:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6m:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7:beta6:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7a:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7:beta4:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7i:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7f:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.8d:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.8e:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.5:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.5:beta1:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6a:beta2:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6a:beta3:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6h:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6c:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.6l:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7:beta1:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7:beta5:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7d:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7g:*:*:*:*:*:x86:*
- cpe:2.3:a:openssl:openssl:0.9.7j:*:*:*:*:*:x86:*
Exploit prediction scoring system (EPSS) score for CVE-2011-4354
0.64%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 76 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2011-4354
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST |
CWE ids for CVE-2011-4354
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2011-4354
-
http://crypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zip
-
http://marc.info/?t=119271238800004
'[openssl.org #1593] BN_nist_mod_384 gives wrong answers' thread - MARC
-
https://bugzilla.redhat.com/show_bug.cgi?id=757909
757909 – (CVE-2011-4354) CVE-2011-4354 openssl: ECC private leak (disclosure of TLS server's private key)
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http://cvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21
-
http://www.debian.org/security/2012/dsa-2390
Debian -- Security Information -- DSA-2390-1 openssl
-
http://openwall.com/lists/oss-security/2011/12/01/6
oss-security - CVE-2011-4354 OpenSSL 0.9.8g (32-bit builds) bug leaks ECC private keys
-
http://eprint.iacr.org/2011/633
Cryptology ePrint Archive: Report 2011/633 - Practical realisation and elimination of an ECC-related software bug attack
-
http://rt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guest
#1593: BN_nist_mod_384 gives wrong answers
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