openssl: ECC private leak (disclosure of TLS server's private key)
Published Jan 27, 2012
5.8
MEDIUMCVSS 2.0
EPSS 2.99%
Description
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.
Affected products
No data.
- ≤ 0.9.8g
- 0.9.1c
- 0.9.2b
- 0.9.3
- 0.9.3a
- 0.9.4
- 0.9.5
- 0.9.5
- 0.9.5
- 0.9.5a
- 0.9.5a
- 0.9.5a
- 0.9.6
- 0.9.6
- 0.9.6
- 0.9.6
- 0.9.6a
- 0.9.6a
- 0.9.6a
- 0.9.6a
- 0.9.6b
- 0.9.6c
- 0.9.6d
- 0.9.6e
- 0.9.6f
- 0.9.6g
- 0.9.6h
- 0.9.6i
- 0.9.6j
- 0.9.6k
- 0.9.6l
- 0.9.6m
- 0.9.7
- 0.9.7
- 0.9.7
- 0.9.7
- 0.9.7
- 0.9.7
- 0.9.7
- 0.9.7a
- 0.9.7b
- 0.9.7c
- 0.9.7d
- 0.9.7e
- 0.9.7f
- 0.9.7g
- 0.9.7h
- 0.9.7i
- 0.9.7j
- 0.9.7k
- 0.9.7l
- 0.9.7m
- 0.9.8
- 0.9.8a
- 0.9.8b
- 0.9.8c
- 0.9.8d
- 0.9.8e
- 0.9.8f
No data.
Red Hat Enterprise Linux 4
openssl
Not affected
Red Hat Enterprise Linux 4
openssl096b
Not affected
Red Hat Enterprise Linux 5
openssl
Not affected
Red Hat Enterprise Linux 5
openssl097a
Not affected
Red Hat Enterprise Linux 6
openssl
Not affected
Red Hat Enterprise Linux 6
openssl098e
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | openssl | Not affected | n/a |
| Red Hat Enterprise Linux 4 | openssl096b | Not affected | n/a |
| Red Hat Enterprise Linux 5 | openssl | Not affected | n/a |
| Red Hat Enterprise Linux 5 | openssl097a | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openssl | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openssl098e | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 3, 4, 5, or 6 as they did not include support for the ECDH or ECDHE ciphers.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.99% (0.02990) | 86.85th | v5 (v2026.06.15) |
| Sep 12, 2026 | 3.00% (0.03001) | 86.61th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.01% (0.04011) | 89.19th | v5 (v2026.06.15) |
| Apr 10, 2025 | 0.60% (0.00603) | 67.18th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.69% (0.01687) | 80.53th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.10% (0.03097) | 77.89th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.41% (0.01412) | 79.20th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.64% (0.00641) | 79.92th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.64% (0.00641) | 78.56th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.64% (0.00641) | 76.02th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
References (11)
- http://crypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zip x_refsource_MISC
- http://cvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21 x_refsource_CONFIRM
- http://eprint.iacr.org/2011/633 x_refsource_MISC
- http://marc.info/?t=119271238800004 x_refsource_CONFIRM
- http://openwall.com/lists/oss-security/2011/12/01/6 mailing-listx_refsource_MLIST
- http://rt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guest x_refsource_CONFIRM
- http://www.debian.org/security/2012/dsa-2390 vendor-advisoryx_refsource_DEBIAN
- https://access.redhat.com/security/cve/CVE-2011-4354 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=757909 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-4354
- https://www.cve.org/CVERecord?id=CVE-2011-4354
| Link | Providers | Tags |
|---|---|---|
| http://crypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zip | x_refsource_MISC | |
| http://cvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21 | x_refsource_CONFIRM | |
| http://eprint.iacr.org/2011/633 | x_refsource_MISC | |
| http://marc.info/?t=119271238800004 | x_refsource_CONFIRM | |
| http://openwall.com/lists/oss-security/2011/12/01/6 | mailing-listx_refsource_MLIST | |
| http://rt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guest | x_refsource_CONFIRM | |
| http://www.debian.org/security/2012/dsa-2390 | vendor-advisoryx_refsource_DEBIAN | |
| https://access.redhat.com/security/cve/CVE-2011-4354 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=757909 | x_refsource_CONFIRMIssue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-4354 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-4354 |
Change history (0)
No recorded changes yet.