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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "[email protected]"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:nasm:netwide_assembler:2.16:rc0:*:*:*:*:*:*", "matchCriteriaId": "20DE5189-1CB2-41BB-81E2-FF8C6CD53A19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function."}, {"lang": "es", "value": "Se presenta una vulnerabilidad de bucle infinito en nasm versi\u00f3n 2.16rc0, por medio de la funci\u00f3n gpaste_tokens"}], "id": "CVE-2021-45257", "lastModified": "2026-06-17T04:13:13.647", "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": "[email protected]", "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": "[email protected]", "type": "Primary"}]}, "published": "2021-12-22T17:15:09.217", "references": [{"source": "[email protected]", "tags": ["Broken Link", "Issue Tracking"], "url": "https://bugzilla.nasm.us/show_bug.cgi?id=3392790"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Issue Tracking"], "url": "https://bugzilla.nasm.us/show_bug.cgi?id=3392790"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "nasm: Infinite loop via the paste_tokens function", "id": "2035087", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2035087"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-835", "details": ["An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.", "An infinite loop flaw was found in nasm's preproc.c via paste_tokens() function. An attacker with local network access could pass a specially crafted unknown input causing an application to halt or crash leading to a denial of service."], "name": "CVE-2021-45257", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "nasm", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "nasm", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "nasm", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "nasm", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-12-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-45257\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-45257"], "statement": "This issue does not affect the versions of NASM shipped with Red Hat Enterprise Linux 6 and 7, as they do not include the vulnerable code in their source code.\nThe version of NASM shipped with Red Hat Enterprise Linux 8 is marked as won't fix because it is low priority flaw and real (non-malicious) assembler source code will never run into this problem.", "threat_severity": "Low"}