CVE-2019-20398

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2019-20398", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2024-08-05T02:39:09.444Z", "dateReserved": "2020-01-22T00:00:00.000Z", "datePublished": "2020-01-22T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2023-09-19T21:06:19.867Z"}, "descriptions": [{"lang": "en", "value": "A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3"}, {"url": "https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08"}, {"url": "https://github.com/CESNET/libyang/issues/773"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793935"}, {"name": "[debian-lts-announce] 20230919 [SECURITY] [DLA 3572-1] libyang security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T02:39:09.444Z"}, "title": "CVE Program Container", "references": [{"url": "https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3", "tags": ["x_transferred"]}, {"url": "https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08", "tags": ["x_transferred"]}, {"url": "https://github.com/CESNET/libyang/issues/773", "tags": ["x_transferred"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793935", "tags": ["x_transferred"]}, {"name": "[debian-lts-announce] 20230919 [SECURITY] [DLA 3572-1] libyang security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"}]}]}}

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{"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:cesnet:libyang:0.11:r1:*:*:*:*:*:*", "matchCriteriaId": "65E91322-5F67-43C2-8112-5ECAEC2A3C12", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:*", "matchCriteriaId": "80A88DE4-93F8-40C3-AA52-A5F353F028AA", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:*", "matchCriteriaId": "05C120CA-50EF-4B6D-92C9-ED736219DB07", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:*", "matchCriteriaId": "99D1FA55-3F56-4E09-B41E-B05C199B96B8", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:*", "matchCriteriaId": "35D48EC4-58D2-49C6-8049-920787733587", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:*", "matchCriteriaId": "B57F3953-49D6-413C-A4AE-03125935FC77", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:*", "matchCriteriaId": "DD62411F-A524-4E80-B540-780EA39CB6A4", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:*", "matchCriteriaId": "FEF091B1-978A-4881-B1FC-6848CD1A7BBF", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:*", "matchCriteriaId": "0C50D690-9A4D-4B78-BF4E-A4D9B4074216", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:*", "matchCriteriaId": "124A5D30-7451-4516-9AA2-963AE62DD679", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:*", "matchCriteriaId": "C260D13B-82E9-4596-9116-61073B42D661", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:1.0:r1:*:*:*:*:*:*", "matchCriteriaId": "5F8D5FC0-959E-4014-9CB7-91378CC8B2BA", "vulnerable": true}, {"criteria": "cpe:2.3:a:cesnet:libyang:1.0:r2:*:*:*:*:*:*", "matchCriteriaId": "DCBDA519-805B-4193-8092-75E2748A7BC3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash."}, {"lang": "es", "value": "Una desreferencia del puntero NULL est\u00e1 presente en libyang versiones anteriores a v1.0-r3, en la funci\u00f3n lys_extension_instances_free() debido a una copia de extensiones no resuelta en la funci\u00f3n lys_restr_dup(). Las aplicaciones que usan libyang para analizar archivos de entrada yang no confiables pueden bloquearse."}], "id": "CVE-2019-20398", "lastModified": "2026-06-17T02:30:21.860", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-01-22T22:15:10.627", "references": [{"source": "cve@mitre.org", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793935"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/CESNET/libyang/issues/773"}, {"source": "cve@mitre.org", "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793935"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/CESNET/libyang/issues/773"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHEA-2021:1906", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "libyang-0:1.0.184-1.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-05-18T00:00:00Z"}], "bugzilla": {"description": "libyang: NULL pointer dereference in function lys_extension_instances_free()", "id": "1793935", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793935"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-476", "details": ["A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.", "A NULL pointer dereference flaw occurs in libyang in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to process untrusted input YANG files may crash."], "name": "CVE-2019-20398", "public_date": "2019-04-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-20398\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-20398"], "threat_severity": "Low"}

{}