{"id":"ALPINE-CVE-2021-23841","details":"The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).","modified":"2026-03-09T01:19:26.757180Z","published":"2021-02-16T17:15:13.377Z","upstream":["CVE-2021-23841"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-23841"}],"affected":[{"package":{"name":"openssl","ecosystem":"Alpine:v3.10","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl","ecosystem":"Alpine:v3.9","purl":"pkg:apk/alpine/openssl?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl3","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/openssl3?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}},{"package":{"name":"openssl3","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/openssl3?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1j-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","1.1.1g-r0","1.1.1h-r0","1.1.1i-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-23841.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}