bouncycastle: Invalid curve attack allowing to extract private keys
Published Nov 9, 2015
3.7
LOWCVSS 3.0
EPSS 4.82%
Description
The Bouncy Castle Java library before 1.51 does not validate a point is withing the elliptic curve, which makes it easier for remote attackers to obtain private keys via a series of crafted elliptic curve Diffie Hellman (ECDH) key exchanges, aka an "invalid curve attack."
Affected products
No data.
Configuration 2
- ≤ 1.50
Configuration 3
- 12.5.0.1
- 12.5.0.2
- 12.5.0.3
- 12.1.4
- 12.2.2
- 8.54
- 8.55
- 3.5.2
No data.
Red Hat JBoss A-MQ 6.3
n/a
Fixed · RHSA-2016:2036
Red Hat JBoss Fuse 6.3
n/a
Fixed · RHSA-2016:2035
Red Hat JBoss A-MQ 6
fabric8
Affected
Red Hat JBoss Fuse 6
fabric8
Affected
Red Hat Satellite 6
bouncycastle
Will not fix
Red Hat Subscription Asset Manager
bouncycastle
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat JBoss A-MQ 6.3 | n/a | Fixed | RHSA-2016:2036 |
| Red Hat JBoss Fuse 6.3 | n/a | Fixed | RHSA-2016:2035 |
| Red Hat JBoss A-MQ 6 | fabric8 | Affected | n/a |
| Red Hat JBoss Fuse 6 | fabric8 | Affected | n/a |
| Red Hat Satellite 6 | bouncycastle | Will not fix | n/a |
| Red Hat Subscription Asset Manager | bouncycastle | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
AV:N/AC:L/Au:N/C:P/I:N/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 | 4.82% (0.04820) | 91.69th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.82% (0.04820) | 90.80th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.96% (0.00963) | 74.50th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.51% (0.03512) | 79.14th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.96% (0.00963) | 74.97th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.25% (0.00246) | 65.17th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.25% (0.00246) | 63.67th | v3 (v2023.03.01) |
| Jun 27, 2023 | 0.25% (0.00246) | 61.29th | v3 (v2023.03.01) |
| May 24, 2023 | 0.22% (0.00221) | 58.79th | v3 (v2023.03.01) |
| May 8, 2023 | 0.29% (0.00293) | 64.51th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.26% (0.00260) | 61.91th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.36% (0.04358) | 88.02th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.36% (0.04358) | 86.83th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.36% (0.04358) | 70.59th | v2 (v2022.01.01) |
References (26)
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174915.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00012.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2035.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-2036.html vendor-advisoryx_refsource_REDHAT
- http://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-attacks.html x_refsource_MISCTechnical Description
- http://www.debian.org/security/2015/dsa-3417 vendor-advisoryx_refsource_DEBIAN
- http://www.openwall.com/lists/oss-security/2015/10/22/7 mailing-listx_refsource_MLISTThird Party AdvisoryVDB Entry
- http://www.openwall.com/lists/oss-security/2015/10/22/9 mailing-listx_refsource_MLISTThird Party AdvisoryVDB Entry
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html x_refsource_CONFIRM
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html x_refsource_CONFIRM
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html x_refsource_CONFIRM
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html x_refsource_CONFIRM
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html x_refsource_CONFIRMThird Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/79091 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1037036 vdb-entryx_refsource_SECTRACK
- http://www.securitytracker.com/id/1037046 vdb-entryx_refsource_SECTRACK
- http://www.securitytracker.com/id/1037053 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2015-7940 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1276272 Issue Tracking
- https://github.com/advisories/GHSA-4mv7-cq75-3qjm Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-7940
- https://usn.ubuntu.com/3727-1 vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2015-7940
- https://www.oracle.com/security-alerts/cpuapr2020.html x_refsource_MISC
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html x_refsource_CONFIRM
Change history (0)
No recorded changes yet.