Timing attack against ECDSA signature generation
Published Oct 29, 2018
5.9
MEDIUMCVSS 3.1
EPSS 4.72%
Description
The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.1.1a (Affected 1.1.1).
Affected products
-
- Version Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i)StatusaffectedConstraints-
- Version Fixed in OpenSSL 1.1.1a (Affected 1.1.1)StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
Configuration 1
Configuration 2
- 14.04
- 16.04
- 18.04
- 18.10
Configuration 3
- 8.0
- 9.0
Configuration 4
Configuration 5
- n/a
Configuration 6
- n/a
- n/a
- n/a
- ≥ 9.4
- n/a
- n/a
- n/a
- n/a
- n/a
Configuration 7
- 11.1.2.4.0
- 0.9.8
- 1.0.0
- 1.0.1
- 12.1.0.5.0
- 13.2.0.0.0
- 13.3.0.0.0
- 12.3.3
- ≤ 5.6.42
- ≥ 5.7.0 · ≤ 5.7.24
- ≥ 8.0.0 · ≤ 8.0.13
- 8.55
- 8.56
- 8.57
- ≥ 17.7 · ≤ 17.12
- 8.4
- 15.1
- 15.2
- 16.1
- 16.2
- 18.8
- 5.4
- 12.1.1.0.0
- < 6.0.0
- ≥ 5.0.0 · < 5.2.24
No data.
Red Hat Enterprise Linux 7
openssl-1:1.0.2k-16.el7_6.1
Fixed · RHSA-2019:0483
Red Hat Enterprise Linux 8
openssl-1:1.1.1c-2.el8
Fixed · RHSA-2019:3700
Red Hat Enterprise Linux 5
openssl
Not affected
Red Hat Enterprise Linux 6
openssl
Will not fix
Red Hat Enterprise Linux 6
openssl098e
Not affected
Red Hat Enterprise Linux 7
OVMF
Will not fix
Red Hat Enterprise Linux 7
openssl098e
Not affected
Red Hat Enterprise Linux 8
compat-openssl10
Not affected
Red Hat Enterprise Linux 8
mingw-openssl
Not affected
Red Hat JBoss Core Services
openssl
Not affected
Red Hat JBoss Enterprise Application Platform 5
openssl
Not affected
Red Hat JBoss Enterprise Application Platform 6
openssl
Not affected
Red Hat JBoss Enterprise Web Server 2
openssl
Not affected
Red Hat JBoss Web Server 3
openssl
Not affected
Red Hat OpenShift Enterprise 3
openssl
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | openssl-1:1.0.2k-16.el7_6.1 | Fixed | RHSA-2019:0483 |
| Red Hat Enterprise Linux 8 | openssl-1:1.1.1c-2.el8 | Fixed | RHSA-2019:3700 |
| Red Hat Enterprise Linux 5 | openssl | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openssl | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | openssl098e | Not affected | n/a |
| Red Hat Enterprise Linux 7 | OVMF | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | openssl098e | Not affected | n/a |
| Red Hat Enterprise Linux 8 | compat-openssl10 | Not affected | n/a |
| Red Hat Enterprise Linux 8 | mingw-openssl | Not affected | n/a |
| Red Hat JBoss Core Services | openssl | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 5 | openssl | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | openssl | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | openssl | Not affected | n/a |
| Red Hat JBoss Web Server 3 | openssl | Not affected | n/a |
| Red Hat OpenShift Enterprise 3 | openssl | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:N/AC:M/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
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.72% (0.04724) | 91.55th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.74% (0.04741) | 90.68th | v5 (v2026.06.15) |
| Apr 20, 2026 | 4.80% (0.04803) | 89.51th | v4 (v2025.03.14) |
| Dec 10, 2025 | 7.04% (0.07042) | 91.14th | v4 (v2025.03.14) |
| Nov 21, 2025 | 9.26% (0.09264) | 92.40th | v4 (v2025.03.14) |
| Nov 18, 2025 | 1.76% (0.01764) | 81.12th | v4 (v2025.03.14) |
| Oct 28, 2025 | 9.26% (0.09264) | 92.36th | v4 (v2025.03.14) |
| Oct 27, 2025 | 6.78% (0.06784) | 90.92th | v4 (v2025.03.14) |
| Oct 1, 2025 | 9.26% (0.09264) | 92.47th | v4 (v2025.03.14) |
| Mar 30, 2025 | 7.08% (0.07077) | 90.64th | v4 (v2025.03.14) |
| Mar 29, 2025 | 14.51% (0.14507) | 90.77th | v4 (v2025.03.14) |
| Mar 20, 2025 | 7.08% (0.07077) | 90.74th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.40% (0.05397) | 89.41th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.43% (0.00426) | 75.16th | v3 (v2023.03.01) |
| Jun 17, 2024 | 0.43% (0.00426) | 74.42th | v3 (v2023.03.01) |
| Apr 30, 2024 | 0.56% (0.00555) | 77.32th | v3 (v2023.03.01) |
| Mar 21, 2024 | 0.48% (0.00478) | 75.30th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.47% (0.00473) | 74.94th | v3 (v2023.03.01) |
| Oct 23, 2023 | 0.47% (0.00473) | 72.91th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.44% (0.00436) | 71.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.64% (0.00641) | 76.02th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.72% (0.04720) | 89.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.72% (0.04720) | 88.14th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.72% (0.04720) | 74.52th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.28% (0.03281) | 66.54th | v1 |
| Jan 6, 2022 | 3.28% (0.03281) | 66.22th | v1 |
| Sep 1, 2021 | 3.28% (0.03281) | 81.60th | v1 |
| Apr 14, 2021 | 3.28% (0.03281) | 0.00th | v1 |
References (19)
- http://www.securityfocus.com/bid/105750 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041986 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:3700 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-0735 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1644356 Issue Tracking
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56fb454d281a023b3f950d969693553d3f3ceea1 x_refsource_CONFIRM
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=b1d6d55ece1c26fa2829e2b819b038d7b6d692b4 x_refsource_CONFIRM
- https://lists.debian.org/debian-lts-announce/2018/11/msg00024.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/ x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-0735
- https://security.netapp.com/advisory/ntap-20181105-0002/ x_refsource_CONFIRMThird Party Advisory
- https://usn.ubuntu.com/3840-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-0735
- https://www.debian.org/security/2018/dsa-4348 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.openssl.org/news/secadv/20181029.txt x_refsource_CONFIRMVendor Advisory
- https://www.oracle.com/security-alerts/cpujan2020.html x_refsource_MISCThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISCPatchThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html x_refsource_CONFIRMPatchThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html x_refsource_MISCPatchThird Party Advisory
Change history (0)
No recorded changes yet.