CVE-2020-26572

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcos_decipher."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-11-29T11:06:10.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22967"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/OpenSC/OpenSC/commit/9d294de90d1cc66956389856e60b6944b27b4817"}, {"name": "[oss-security] 20201124 OpenSC 0.21.0 released", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://www.openwall.com/lists/oss-security/2020/11/24/4"}, {"name": "FEDORA-2020-7c80831ffe", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXOHFDMNMO6IDECAGUTB3SJGAGXVRT6S/"}, {"name": "[debian-lts-announce] 20211129 [SECURITY] [DLA 2832-1] opensc security update", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00027.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2020-26572", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcos_decipher."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22967", "refsource": "MISC", "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22967"}, {"name": "https://github.com/OpenSC/OpenSC/commit/9d294de90d1cc66956389856e60b6944b27b4817", "refsource": "MISC", "url": "https://github.com/OpenSC/OpenSC/commit/9d294de90d1cc66956389856e60b6944b27b4817"}, {"name": "[oss-security] 20201124 OpenSC 0.21.0 released", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2020/11/24/4"}, {"name": "FEDORA-2020-7c80831ffe", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EXOHFDMNMO6IDECAGUTB3SJGAGXVRT6S/"}, {"name": "[debian-lts-announce] 20211129 [SECURITY] [DLA 2832-1] opensc security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00027.html"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T15:56:04.897Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22967"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/OpenSC/OpenSC/commit/9d294de90d1cc66956389856e60b6944b27b4817"}, {"name": "[oss-security] 20201124 OpenSC 0.21.0 released", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2020/11/24/4"}, {"name": "FEDORA-2020-7c80831ffe", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXOHFDMNMO6IDECAGUTB3SJGAGXVRT6S/"}, {"name": "[debian-lts-announce] 20211129 [SECURITY] [DLA 2832-1] opensc security update", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00027.html"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2020-26572", "datePublished": "2020-10-06T01:03:56.000Z", "dateReserved": "2020-10-06T00:00:00.000Z", "dateUpdated": "2024-08-04T15:56:04.897Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:opensc_project:opensc:*:*:*:*:*:*:*:*", "matchCriteriaId": "E3923253-943B-433F-B8B8-A78697C322FC", "versionEndIncluding": "0.20.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcos_decipher."}, {"lang": "es", "value": "El controlador de software de la tarjeta inteligente TCOS en OpenSC versiones anteriores a 0.21.0-rc1, presenta un desbordamiento en la regi\u00f3n stack de la memoria en la funci\u00f3n tcos_decipher"}], "id": "CVE-2020-26572", "lastModified": "2026-06-17T03:08:13.493", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-10-06T02:15:13.130", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2020/11/24/4"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22967"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/OpenSC/OpenSC/commit/9d294de90d1cc66956389856e60b6944b27b4817"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00027.html"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXOHFDMNMO6IDECAGUTB3SJGAGXVRT6S/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2020/11/24/4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22967"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/OpenSC/OpenSC/commit/9d294de90d1cc66956389856e60b6944b27b4817"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00027.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXOHFDMNMO6IDECAGUTB3SJGAGXVRT6S/"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2021:1600", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "opensc-0:0.20.0-4.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-05-18T00:00:00Z"}], "bugzilla": {"description": "opensc: stack-based buffer overflow in tcos_decipher", "id": "1885954", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1885954"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.4", "cvss3_scoring_vector": "CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-121->CWE-787", "details": ["The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcos_decipher."], "mitigation": {"lang": "en:us", "value": "This flaw can be mitigated in cases where you can use opensc without the TCOS driver enabled. In such cases, the vulnerable driver can be disabled by specifying them in /etc/opensc.conf card_drivers field in allowlist fashion.\nOne such example:\n```\napp default {\ncard_drivers = cac, cac1, PIV-II;\n}\n```\nThis would only enable the cac, cac1, and PIV-II smart card drivers, and all others would be disabled, including the TCOS driver. With the TCOS driver disabled, this flaw is mitigated. It is important to list all drivers that you need in the card_drivers field so that they are not disabled too."}, "name": "CVE-2020-26572", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "opensc", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2020-10-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-26572\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-26572"], "threat_severity": "Moderate"}

{}