{"schema_version":"1.7.5","id":"CVE-2021-43527","published":"2021-12-08T22:15:09.163Z","modified":"2026-04-16T04:35:26.092454493Z","related":["ALSA-2021:4903","SUSE-SU-2021:14858-1","SUSE-SU-2021:3934-1","SUSE-SU-2021:3939-1","SUSE-SU-2022:2536-1","SUSE-SU-2024:2008-1","SUSE-SU-2024:2010-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2183-1","SUSE-SU-2024:2185-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1","SUSE-SU-2025:02334-1","openSUSE-SU-2021:3934-1","openSUSE-SU-2024:11663-1"],"details":"NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \\#7, or PKCS \\#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.","affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43527.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"3.73"}]},{"events":[{"introduced":"0"},{"fixed":"3.68.1"}]},{"events":[{"introduced":"11.0"},{"last_affected":"11.70.1"}]},{"events":[{"introduced":"0"},{"last_affected":"1.11.0"}]},{"events":[{"introduced":"0"},{"last_affected":"1.15.0"}]},{"events":[{"introduced":"0"},{"last_affected":"1.15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"1.8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"12.6.0.0.0"}]},{"events":[{"introduced":"0"},{"last_affected":"v8r13"}]},{"events":[{"introduced":"0"},{"last_affected":"v8r13-14398"}]}]}}],"references":[{"type":"ADVISORY","url":"https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/"},{"type":"ADVISORY","url":"https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202212-05"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20211229-0002/"},{"type":"ADVISORY","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-51/"},{"type":"ADVISORY","url":"https://www.starwindsoftware.com/security/sw-20220802-0001/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1737470"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}