CVE-2019-1547
ECDSA remote timing attack
At a glance
- Severity
- Not available
- EPSS
- EPSS 1.16 % · percentile 67 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- openssl
- NVD status
- Modified
Description
Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | LOW 1.9 | AV:L/AC:M/Au:N/C:P/I:N/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2019-10104
- GCVE · GCVE-0-2019-1547
CERT-FR advisories
- CERTFR-2024-AVI-0262 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0180 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2020-AVI-691 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
- CERTFR-2020-AVI-218 — Multiples vulnérabilités dans Oracle MySQL · cert.ssi.gouv.fr
- CERTFR-2020-AVI-038 — Multiples vulnérabilités dans Oracle Virtualization · cert.ssi.gouv.fr
- CERTFR-2020-AVI-036 — Multiples vulnérabilités dans Oracle MySQL · cert.ssi.gouv.fr
- CERTFR-2019-AVI-657 — Multiples vulnérabilités dans Tenable.sc · cert.ssi.gouv.fr
- CERTFR-2019-AVI-649 — Multiples vulnérabilités dans Tenable Nessus Network Monitor · cert.ssi.gouv.fr
- CERTFR-2019-AVI-511 — Multiples vulnérabilités dans Oracle Virtualization · cert.ssi.gouv.fr
- CERTFR-2019-AVI-444 — Multiples vulnérabilités dans OpenSSL · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 1.0.2 ≤ 1.0.2scpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 1.1.0 ≤ 1.1.0kcpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 1.1.1 ≤ 1.1.1c
Affected products
| Product | Versions |
|---|---|
| OpenSSL · OpenSSL | affected Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c) ; affected Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k) ; affected Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s) |
References
- https://seclists.org/bugtraq/2019/Sep/25
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00054.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GY6SNRJP2S7Y42GIIDO3HXPNMDYN2U3A/
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00072.html
- https://lists.debian.org/debian-lts-announce/2019/09/msg00026.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZN4VVQJ3JDCHGIHV4Y2YTXBYQZ6PWQ7E/
- https://seclists.org/bugtraq/2019/Oct/1
- https://seclists.org/bugtraq/2019/Oct/0
- https://www.debian.org/security/2019/dsa-4539
- https://www.debian.org/security/2019/dsa-4540
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00016.html
- https://security.gentoo.org/glsa/201911-04
- https://usn.ubuntu.com/4376-1/
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.tenable.com/security/tns-2019-08
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.openssl.org/news/secadv/20190910.txt
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=30c22fa8b1d840036b8e203585738df62a03cec8
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=7c1709c2da5414f5b6133d00a03fc8c5bf996c7a
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=21c856b75d81eff61aa63b4f036bb64a85bf6d46
- https://arxiv.org/abs/1909.01785
- http://packetstormsecurity.com/files/154467/Slackware-Security-Advisory-openssl-Updates.html
- https://security.netapp.com/advisory/ntap-20190919-0002/
- https://support.f5.com/csp/article/K73422160?utm_source=f5support&%3Butm_medium=RSS
- https://www.tenable.com/security/tns-2019-09
- https://security.netapp.com/advisory/ntap-20200122-0002/
- https://security.netapp.com/advisory/ntap-20200416-0003/
- https://usn.ubuntu.com/4376-2/
- https://usn.ubuntu.com/4504-1/
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10365
- https://security.netapp.com/advisory/ntap-20240621-0006/
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |