ChaCha20-Poly1305 with long nonces

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

No source has published a CVSS score for this record yet.

• CISA KEV Not listed.
• EPSS 0.057, the 93rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 6 Mar 2019, 21:00 UTC Confirmed by the CVE List
2. 6 Mar 2019, 21:29 UTC Confirmed by NVD

Sources

• CVE List: CVE-2019-1543
• NVD: CVE-2019-1543

References from the CNA

• git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f426625b6ae9a7831010750490a5f0ad689c5ba3 confirm
• www.openssl.org/news/secadv/20190306.txt confirm
• git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ee22257b1418438ebaf54df98af4e24f494d1809 confirm
• seclists.org/bugtraq/2019/Jul/3 mailing-listbugtraq
• www.debian.org/security/2019/dsa-4475 vendor-advisorydebian
• www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
• lists.opensuse.org/opensuse-security-announce/2019-07/msg00056.html vendor-advisorysuse
• lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/ vendor-advisoryfedora
• lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/ vendor-advisoryfedora
• www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
• access.redhat.com/errata/RHSA-2019:3700 vendor-advisoryredhat
• www.oracle.com/security-alerts/cpuapr2020.html
• kc.mcafee.com/corporate/index?page=content&id=SB10365 confirm

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.