GHSA-hwpr-jc4f-7ww3CriticalCVSS 9.8
Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR....
🔗 CVE IDs covered (1)
📋 Description
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.
🔗 References (6)
- https://nvd.nist.gov/vuln/detail/CVE-2026-64193
- 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
- https://github.com/advisories/GHSA-hwpr-jc4f-7ww3