{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-43527", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "assignerShortName": "mozilla", "dateUpdated": "2024-08-04T03:55:29.297Z", "dateReserved": "2021-11-08T00:00:00.000Z", "datePublished": "2021-12-08T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2022-12-19T00:00:00.000Z"}, "descriptions": [{"lang": "en", "value": "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": [{"vendor": "Mozilla", "product": "NSS", "versions": [{"version": "unspecified", "lessThan": "3.73", "status": "affected", "versionType": "custom"}, {"version": "unspecified", "lessThan": "3.68.1", "status": "affected", "versionType": "custom"}]}], "references": [{"url": "https://www.mozilla.org/security/advisories/mfsa2021-51/"}, {"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1737470"}, {"url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/"}, {"url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/"}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"url": "https://security.netapp.com/advisory/ntap-20211229-0002/"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf"}, {"url": "https://www.starwindsoftware.com/security/sw-20220802-0001/"}, {"name": "GLSA-202212-05", "tags": ["vendor-advisory"], "url": "https://security.gentoo.org/glsa/202212-05"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "Memory corruption via DER-encoded DSA and RSA-PSS signatures"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T03:55:29.297Z"}, "title": "CVE Program Container", "references": [{"url": "https://www.mozilla.org/security/advisories/mfsa2021-51/", "tags": ["x_transferred"]}, {"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1737470", "tags": ["x_transferred"]}, {"url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/", "tags": ["x_transferred"]}, {"url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/", "tags": ["x_transferred"]}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html", "tags": ["x_transferred"]}, {"url": "https://security.netapp.com/advisory/ntap-20211229-0002/", "tags": ["x_transferred"]}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf", "tags": ["x_transferred"]}, {"url": "https://www.starwindsoftware.com/security/sw-20220802-0001/", "tags": ["x_transferred"]}, {"name": "GLSA-202212-05", "tags": ["vendor-advisory", "x_transferred"], "url": "https://security.gentoo.org/glsa/202212-05"}]}]}}

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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."}, {"lang": "es", "value": "NSS (Network Security Services) versiones anteriores a 3.73 o 3.68.1, ESR son vulnerables a un desbordamiento de pila cuando manejan firmas DSA o RSA-PSS codificadas con DER. Es probable que las aplicaciones que usan NSS para manejar firmas codificadas en CMS, S/MIME, PKCS \\#7 o PKCS \\#12 est\u00e9n afectadas. Las aplicaciones que usan NSS para la comprobaci\u00f3n de certificados u otras funcionalidades de TLS, X.509, OCSP o CRL pueden verse afectadas, dependiendo de c\u00f3mo configuren NSS. *Nota: Esta vulnerabilidad NO afecta a Mozilla Firefox. Sin embargo, se cree que los clientes de correo electr\u00f3nico y los visores de PDF que usan NSS para la verificaci\u00f3n de firmas, como Thunderbird, LibreOffice, Evolution y Evince, pueden verse afectados. Esta vulnerabilidad afecta a NSS versiones anteriores a 3.73 y NSS versiones anteriores a 3.68.1"}], "id": "CVE-2021-43527", "lastModified": "2024-11-21T06:29:21.467", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-12-08T22:15:09.163", "references": [{"source": "security@mozilla.org", "tags": ["Issue Tracking", "Permissions Required", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1737470"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202212-05"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20211229-0002/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-51/"}, {"source": "security@mozilla.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://www.starwindsoftware.com/security/sw-20220802-0001/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Permissions Required", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1737470"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202212-05"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20211229-0002/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-51/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.starwindsoftware.com/security/sw-20220802-0001/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Tavis Ormandy (Project Zero) for reporting this issue. Upstream acknowledges the Mozilla project as the original reporter.", "affected_release": [{"advisory": "RHSA-2021:4907", "cpe": "cpe:/o:redhat:rhel_els:6", "package": "nss-0:3.44.0-12.el6_10", "product_name": "Red Hat Enterprise Linux 6 Extended Lifecycle Support", "release_date": "2021-12-01T00:00:00Z"}, {"advisory": "RHSA-2021:4904", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "nss-0:3.67.0-4.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2021-12-01T00:00:00Z"}, {"advisory": "RHSA-2021:4994", "cpe": "cpe:/o:redhat:rhel_aus:7.3", "package": "nss-0:3.28.4-2.el7_3", "product_name": "Red Hat Enterprise Linux 7.3 Advanced Update Support", "release_date": "2021-12-07T00:00:00Z"}, {"advisory": "RHSA-2021:4932", "cpe": "cpe:/o:redhat:rhel_aus:7.4", "package": "nss-0:3.28.4-18.el7_4", "product_name": "Red Hat Enterprise Linux 7.4 Advanced Update Support", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4933", "cpe": "cpe:/o:redhat:rhel_aus:7.6", "package": "nss-0:3.36.0-10.2.el7_6", "product_name": "Red Hat Enterprise Linux 7.6 Advanced Update Support(Disable again in 2026 - SPRHEL-7118)", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4933", "cpe": "cpe:/o:redhat:rhel_tus:7.6", "package": "nss-0:3.36.0-10.2.el7_6", "product_name": "Red Hat Enterprise Linux 7.6 Telco Extended Update Support", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4933", "cpe": "cpe:/o:redhat:rhel_e4s:7.6", "package": "nss-0:3.36.0-10.2.el7_6", "product_name": "Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4946", "cpe": "cpe:/o:redhat:rhel_aus:7.7", "package": "nss-0:3.44.0-8.el7_7", "product_name": "Red Hat Enterprise Linux 7.7 Advanced Update Support", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4946", "cpe": "cpe:/o:redhat:rhel_tus:7.7", "package": "nss-0:3.44.0-8.el7_7", "product_name": "Red Hat Enterprise Linux 7.7 Telco Extended Update Support", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4946", "cpe": "cpe:/o:redhat:rhel_e4s:7.7", "package": "nss-0:3.44.0-8.el7_7", "product_name": "Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4903", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "nss-0:3.67.0-7.el8_5", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-12-01T00:00:00Z"}, {"advisory": "RHSA-2021:4953", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "nss-0:3.44.0-10.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4969", "cpe": "cpe:/a:redhat:rhel_e4s:8.1", "package": "thunderbird-0:91.3.0-3.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4919", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "nss-0:3.53.1-12.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2021-12-02T00:00:00Z"}, {"advisory": "RHSA-2021:4954", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "thunderbird-0:91.3.0-3.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2021-12-06T00:00:00Z"}, {"advisory": "RHSA-2021:4909", "cpe": "cpe:/a:redhat:rhel_eus:8.4", "package": "nss-0:3.67.0-7.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Extended Update Support", "release_date": "2021-12-02T00:00:00Z"}, {"advisory": "RHSA-2021:5035", "cpe": "cpe:/o:redhat:enterprise_linux:7::hypervisor", "package": "redhat-virtualization-host-0:4.3.20-20211202.1.el7_9", "product_name": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 7", "release_date": "2021-12-08T00:00:00Z"}, {"advisory": "RHSA-2021:5006", "cpe": "cpe:/o:redhat:rhev_hypervisor:4.4::el8", "package": "redhat-virtualization-host-0:4.4.9-202112061811_8.5", "product_name": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8", "release_date": "2021-12-08T00:00:00Z"}], "bugzilla": {"description": "nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS)", "id": "2024370", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2024370"}, "csaw": true, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-120", "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.", "A remote code execution flaw was found in the way NSS verifies certificates. This flaw allows an attacker posing as an SSL/TLS server to trigger this issue in a client application compiled with NSS when it tries to initiate an SSL/TLS connection. Similarly, a server application compiled with NSS, which processes client certificates, can receive a malicious certificate via a client, triggering the flaw. The highest threat to this vulnerability is confidentiality, integrity, as well as system availability."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2021-43527", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "nss", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-12-01T16:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-43527\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-43527\nhttps://googleprojectzero.blogspot.com/2021/12/this-shouldnt-have-happened.html\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2021-51/"], "statement": "The issue is not limited to TLS. Any applications that use NSS certificate verification are vulnerable; S/MIME is impacted as well. Similarly, a server application compiled with NSS, which processes client certificates, can receive a malicious certificate via a client.\nFirefox is not vulnerable to this flaw as it uses the mozilla::pkix for certificate verification. Thunderbird is affected when parsing email with the S/MIME signature. Thunderbird on Red Hat Enterprise Linux 8.4 and later does not need to be updated since it uses the system NSS library, but earlier Red Hat Enterprise Linux 8 extended life streams will need to update Thunderbird as well as NSS.", "threat_severity": "Critical"}

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