CVE-2021-45261

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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:gnu:patch:2.7:*:*:*:*:*:*:*", "matchCriteriaId": "AD560EB4-8686-438E-B190-4300CBAC19B1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An Invalid Pointer vulnerability exists in GNU patch 2.7 via the another_hunk function, which causes a Denial of Service."}, {"lang": "es", "value": "Se presenta una vulnerabilidad de Puntero no V\u00e1lido en GNU patch versi\u00f3n 2.7, por medio de la funci\u00f3n another_hunk, que causa una denegaci\u00f3n de servicio"}], "id": "CVE-2021-45261", "lastModified": "2026-06-17T04:13:14.107", "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": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-12-22T18:15:08.100", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://savannah.gnu.org/bugs/?61685"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://savannah.gnu.org/bugs/?61685"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-763"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "patch: Invalid Pointer via another_hunk function", "id": "2035081", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2035081"}, "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": "draft"}, "cwe": "CWE-763", "details": ["An Invalid Pointer vulnerability exists in GNU patch 2.7 via the another_hunk function, which causes a Denial of Service.", "A flaw was found in patch. A possible memory corruption vulnerability could allow an attacker to input a specially crafted patch file leading to a crash or code execution."], "name": "CVE-2021-45261", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "patch", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "patch", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "patch", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "patch", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-12-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-45261\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-45261"], "statement": "This vulnerability is classified as low severity rather than moderate because it requires user interaction to be exploited, limiting its attack vector. An attacker must trick a user into manually applying a specially crafted patch file, reducing the likelihood of widespread exploitation.", "threat_severity": "Low"}

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