CVE-2026-64193

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{"affected": [{"affectedData": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Net-DNS", "product": "Net::DNS", "programFiles": ["lib/Net/DNS/RR/OPT.pm"], "programRoutines": [{"name": "Net::DNS::RR::OPT::EXTENDED_ERROR::_decompose"}], "repo": "https://www.net-dns.org/svn/net-dns/", "vendor": "NLNETLABS", "versions": [{"lessThanOrEqual": "1.55", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR.\n\nNet::DNS::RR::OPT::EXTENDED_ERROR::_decompose parses the EXTRA-TEXT field of an EDNS EXTENDED-ERROR option (RFC 8914) by tokenising the raw bytes and passing the result to Perl's eval. There is some escaping done for $ and @, but not for backticks. This can be exploited for command execution if $pkt->edns->option('EXTENDED-ERROR') is called in array context, for example with a payload of {0:`\"<command>\"`} in EXTRA-TEXT."}, {"lang": "es", "value": "Las versiones de Net::DNS hasta la 1.55 para Perl permiten la inyecci\u00f3n de ejecuci\u00f3n remota a trav\u00e9s de EDNS EXTENDED ERROR.\n\nNet::DNS::RR::OPT::EXTENDED_ERROR::_decompose analiza el campo EXTRA-TEXT de una opci\u00f3n EDNS EXTENDED-ERROR (RFC 8914) tokenizando los bytes sin procesar y pasando el resultado a la funci\u00f3n eval de Perl. Se realiza cierto escape para $ y @, pero no para las comillas invertidas. Esto puede explotarse para la ejecuci\u00f3n de comandos si se llama a $pkt -> edns -> option(\u2019EXTENDED-ERROR\u2019) en un contexto de array, por ejemplo, con una carga \u00fatil de {0:\u201c\u201c[command]\u201d\u201d} en EXTRA-TEXT."}], "id": "CVE-2026-64193", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64193", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-21T18:54:48.456598Z", "version": "2.0.3"}}]}, "published": "2026-07-20T19:17:30.047", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://rt.cpan.org/Ticket/Display.html?id=179945"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/07/20/12"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-95"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{"bugzilla": {"description": "Net::DNS: Net::DNS: Arbitrary code execution via EDNS EXTENDED ERROR handling", "id": "2502954", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502954"}, "csaw": false, "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": "draft"}, "cwe": "CWE-78", "details": ["A flaw was found in Net::DNS. A remote attacker can exploit a vulnerability in the handling of EDNS (Extension Mechanisms for DNS) EXTENDED ERROR options, leading to arbitrary code execution. The affected component processes the `EXTRA-TEXT` field of an EDNS EXTENDED-ERROR option without properly escaping special characters, which allows for command injection. This enables an attacker to execute unauthorized commands on the system."], "name": "CVE-2026-64193", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "perl-Net-DNS", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "perl-Net-DNS", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "perl-Net-DNS", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "perl-Net-DNS", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-20T17:54:42Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64193\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64193\nhttps://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes\nhttps://rt.cpan.org/Ticket/Display.html?id=179945\nhttps://www.net-dns.org/blog/#release-candidate-for-netdns-1.56"], "threat_severity": "Critical"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.55]"}}], "enrichment": {"confidence": 94.0, "confidence_source": "matching", "scores": [{"score": 94.0, "source": "matching"}]}, "original": {"product": "Net::DNS", "source": "cna", "vendor": "NLNETLABS"}, "product": "net_dns", "vendor": "nlnet_labs"}], "created": "2026-07-21T20:15:02.599596+00:00", "updated": "2026-08-01T07:15:03.373527+00:00", "vendors": ["nlnet_labs", "nlnet_labs$PRODUCT$net_dns"], "weaknesses": ["CWE-78", "CWE-95"]}