CVE-2026-64193

Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR. Net::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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes
https://rt.cpan.org/Ticket/Display.html?id=179945
https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56
http://www.openwall.com/lists/oss-security/2026/07/20/12

Configurations

No configuration.

History

24 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de Net::DNS hasta la 1.55 para Perl permiten la inyección de ejecución remota a través de EDNS EXTENDED ERROR. Net::DNS::RR::OPT::EXTENDED_ERROR::_decompose analiza el campo EXTRA-TEXT de una opción EDNS EXTENDED-ERROR (RFC 8914) tokenizando los bytes sin procesar y pasando el resultado a la función eval de Perl. Se realiza cierto escape para $ y @, pero no para las comillas invertidas. Esto puede explotarse para la ejecución de comandos si se llama a $pkt -> edns -> option(’EXTENDED-ERROR’) en un contexto de array, por ejemplo, con una carga útil de {0:““[command]””} en EXTRA-TEXT.

Information

Published : 2026-07-20 19:17

Updated : 2026-10-24 20:10

NVD link : CVE-2026-64193

Mitre link : CVE-2026-64193

CVE.ORG link : CVE-2026-64193

JSON object : View

Products Affected

No product.

CWE

CWE-95

Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

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