- 4.7MediumCVSS base score
- 1.1%Exploitation in 30 daysEPSS · top 33% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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).
Timeline
ID reserved
By openssl
- 10 months later
· 10 months later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.1% · top 33% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.
Affected products
References
References35
- 20190912 [slackware-security] openssl (SSA:2019-254-03) (opens in a new tab)mailing-listx_transferred
- openSUSE-SU-2019:2158 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2019-d15aac6c4e (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2019:2189 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20190925 [SECURITY] [DLA 1932-1] openssl security update (opens in a new tab)mailing-listx_transferred
- FEDORA-2019-d51641f152 (opens in a new tab)vendor-advisoryx_transferred
- 20191001 [SECURITY] [DSA 4539-1] openssl security update (opens in a new tab)mailing-listx_transferred
- 20191001 [SECURITY] [DSA 4540-1] openssl1.0 security update (opens in a new tab)mailing-listx_transferred
- DSA-4539 (opens in a new tab)vendor-advisoryx_transferred
- DSA-4540 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2019:2268 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2019:2269 (opens in a new tab)vendor-advisoryx_transferred
- GLSA-201911-04 (opens in a new tab)vendor-advisoryx_transferred
- USN-4376-1 (opens in a new tab)vendor-advisoryx_transferred
- https://www.oracle.com/security-alerts/cpuapr2020.html (opens in a new tab)x_transferred
- https://www.oracle.com/security-alerts/cpujul2020.html (opens in a new tab)x_transferred
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html (opens in a new tab)x_transferred
- https://www.tenable.com/security/tns-2019-08 (opens in a new tab)x_transferred
- https://www.oracle.com/security-alerts/cpujan2020.html (opens in a new tab)x_transferred
- https://www.openssl.org/news/secadv/20190910.txt (opens in a new tab)x_transferred
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=30c22fa8b1d840036b8e203585738df62a03cec8 (opens in a new tab)x_transferred
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=7c1709c2da5414f5b6133d00a03fc8c5bf996c7a (opens in a new tab)x_transferred
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=21c856b75d81eff61aa63b4f036bb64a85bf6d46 (opens in a new tab)x_transferred
- https://arxiv.org/abs/1909.01785 (opens in a new tab)x_transferred
- http://packetstormsecurity.com/files/154467/Slackware-Security-Advisory-openssl-Updates.html (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20190919-0002/ (opens in a new tab)x_transferred
- https://support.f5.com/csp/article/K73422160?utm_source=f5support&%3Butm_medium=RSS (opens in a new tab)x_transferred
- https://www.tenable.com/security/tns-2019-09 (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20200122-0002/ (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20200416-0003/ (opens in a new tab)x_transferred
- USN-4376-2 (opens in a new tab)vendor-advisoryx_transferred
- USN-4504-1 (opens in a new tab)vendor-advisoryx_transferred
- https://www.oracle.com/security-alerts/cpuoct2020.html (opens in a new tab)x_transferred
- https://kc.mcafee.com/corporate/index?page=content&id=SB10365 (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20240621-0006/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-10104 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-1547)Record last updated .