Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack
Published May 13, 2016
7.5
HIGHCVSS 3.0
EPSS 2.44%
Description
Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack.
Affected products
No data.
Configuration 1
- 8.0
- 24
Configuration 2
- 1.10.12
- 1.11.0
- 1.11.1
- 1.11.2
- 1.11.3
- 1.11.4
- 1.11.5
- 1.11.6
- 1.11.7
- 1.11.8
- 1.11.9
- 1.11.10
- 1.11.11
- 1.11.12
- 1.11.13
- 1.11.14
- 1.11.15
- 1.11.16
- 1.11.17
- 1.11.18
- 1.11.19
- 1.11.20
- 1.11.21
- 1.11.22
- 1.11.23
- 1.11.24
- 1.11.25
- 1.11.26
- 1.11.27
- 1.11.28
No data.
No Red Hat product state for this CVE.
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:L/PR:N/UI:N/S:U/C:H/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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.44% (0.02443) | 83.74th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.46% (0.02463) | 82.32th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.59% (0.00586) | 67.21th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.64% (0.00638) | 79.86th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.64% (0.00638) | 78.50th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.64% (0.00638) | 75.90th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (5)
- http://botan.randombit.net/security.html x_refsource_CONFIRMVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.html vendor-advisoryx_refsource_FEDORA
- http://marc.info/?l=botan-devel&m=146185420505943&w=2 mailing-listx_refsource_MLISTVendor Advisory
- http://www.debian.org/security/2016/dsa-3565 vendor-advisoryx_refsource_DEBIAN
- https://security.gentoo.org/glsa/201701-23 vendor-advisoryx_refsource_GENTOO
| Link | Providers | Tags |
|---|---|---|
| http://botan.randombit.net/security.html | x_refsource_CONFIRMVendor Advisory | |
| http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.html | vendor-advisoryx_refsource_FEDORA | |
| http://marc.info/?l=botan-devel&m=146185420505943&w=2 | mailing-listx_refsource_MLISTVendor Advisory | |
| http://www.debian.org/security/2016/dsa-3565 | vendor-advisoryx_refsource_DEBIAN | |
| https://security.gentoo.org/glsa/201701-23 | vendor-advisoryx_refsource_GENTOO |
Change history (0)
No recorded changes yet.