{"id":"ALPINE-CVE-2020-1967","details":"Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the \"signature_algorithms_cert\" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f).","modified":"2025-12-03T22:46:53.213728Z","published":"2020-04-21T14:15:11.287Z","upstream":["CVE-2020-1967"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2020-1967"}],"affected":[{"package":{"name":"openssl","ecosystem":"Alpine:v3.10","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"versions":["1.1.1-r1","1.1.1-r2","1.1.1-r3","1.1.1-r4","1.1.1-r5","1.1.1a-r0","1.1.1a-r1","1.1.1b-r0","1.1.1b-r1","1.1.1c-r0","1.1.1d-r0","1.1.1d-r1","1.1.1d-r2"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-1967.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"versions":["1.1.1-r1","1.1.1-r2","1.1.1-r3","1.1.1-r4","1.1.1-r5","1.1.1a-r0","1.1.1a-r1","1.1.1b-r0","1.1.1b-r1","1.1.1c-r0","1.1.1c-r1","1.1.1d-r1","1.1.1d-r2","1.1.1d-r3"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-1967.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"versions":["1.1.1-r1","1.1.1-r2","1.1.1-r3","1.1.1-r4","1.1.1-r5","1.1.1a-r0","1.1.1a-r1","1.1.1b-r0","1.1.1b-r1","1.1.1c-r0","1.1.1c-r1","1.1.1d-r1","1.1.1d-r2","1.1.1d-r3","1.1.1d-r4","1.1.1d-r5","1.1.1e-r0","1.1.1f-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-1967.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"versions":["1.1.1-r1","1.1.1-r2","1.1.1-r3","1.1.1-r4","1.1.1-r5","1.1.1a-r0","1.1.1a-r1","1.1.1b-r0","1.1.1b-r1","1.1.1c-r0","1.1.1c-r1","1.1.1d-r1","1.1.1d-r2","1.1.1d-r3","1.1.1d-r4","1.1.1d-r5","1.1.1e-r0","1.1.1f-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-1967.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"versions":["1.1.1-r1","1.1.1-r2","1.1.1-r3","1.1.1-r4","1.1.1-r5","1.1.1a-r0","1.1.1a-r1","1.1.1b-r0","1.1.1b-r1","1.1.1c-r0","1.1.1c-r1","1.1.1d-r1","1.1.1d-r2","1.1.1d-r3","1.1.1d-r4","1.1.1d-r5","1.1.1e-r0","1.1.1f-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-1967.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-1967.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-1967.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"versions":["1.1.1-r0","1.1.1-r1","1.1.1-r2","1.1.1-r3","1.1.1-r4","1.1.1-r5","1.1.1a-r0","1.1.1a-r1","1.1.1b-r0","1.1.1b-r1","1.1.1c-r0","1.1.1c-r1","1.1.1d-r1","1.1.1d-r2","1.1.1d-r3","1.1.1d-r4","1.1.1d-r5","1.1.1e-r0","1.1.1f-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-1967.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"versions":["1.1.1-r0","1.1.1-r1","1.1.1-r2","1.1.1-r3","1.1.1-r4","1.1.1-r5","1.1.1a-r0","1.1.1a-r1","1.1.1b-r0","1.1.1b-r1","1.1.1c-r0","1.1.1c-r1","1.1.1d-r1","1.1.1d-r2","1.1.1d-r3","1.1.1d-r4","1.1.1d-r5","1.1.1e-r0","1.1.1f-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-1967.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1g-r0"}]}],"versions":["1.1.1-r0","1.1.1-r1","1.1.1-r2","1.1.1-r3","1.1.1-r4","1.1.1-r5","1.1.1a-r0","1.1.1a-r1","1.1.1b-r0","1.1.1b-r1","1.1.1c-r0","1.1.1c-r1","1.1.1d-r1","1.1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