DEBIAN-CVE-2026-64193
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-64193
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-64193.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-64193
- Upstream
- Published
- 2026-07-20T19:17:30Z
- Modified
- 2026-09-14T17:03:27Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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
Affected packages
Debian:13 / libnet-dns-perl
Package
- Name
- libnet-dns-perl
- Purl
- pkg:deb/debian/libnet-dns-perl?arch=source&distro=trixie
Debian:14 / libnet-dns-perl
Package
- Name
- libnet-dns-perl
- Purl
- pkg:deb/debian/libnet-dns-perl?arch=source&distro=forky