Description
OpenSSL 1.1.1 introduced a rewritten random number generator (RNG). This was intended to include protection in the event of a fork() system call in order to ensure that the parent and child processes did not share the same RNG state. However this protection was not being used in the default case. A partial mitigation for this issue is that the output from a high precision timer is mixed into the RNG state so the likelihood of a parent and child process sharing state is significantly reduced. If an application already calls OPENSSL_init_crypto() explicitly using OPENSSL_INIT_ATFORK then this problem does not occur at all. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c).
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 6.2% · top 6.5% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
- Random Number Generation
- CWE-330 (opens in a new tab)All about CWE-330 and its CVEs
Affected products
References (15)
- FEDORA-2019-d15aac6c4e (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2019-d51641f152 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 20191001 [SECURITY] [DSA 4539-1] openssl security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- DSA-4539 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- USN-4376-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://www.oracle.com/security-alerts/cpuapr2020.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.oracle.com/security-alerts/cpujul2020.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.oracle.com/security-alerts/cpujan2020.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.openssl.org/news/secadv/20190910.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://security.netapp.com/advisory/ntap-20190919-0002/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=1b0fe00e2704b5e20334a16d3c9099d1ba2ef1be (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.f5.com/csp/article/K44070243 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.f5.com/csp/article/K44070243?utm_source=f5support&%3Butm_medium=RSS (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.oracle.com/security-alerts/cpuoct2020.html (opens in a new tab)x_refsource_MISCx_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)
- 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://trackcve.app/cve/CVE-2019-1549)Record last updated .