Bug 2509247
| Summary: | CVE-2026-64193 perl-Net-DNS: Net::DNS: Arbitrary code execution via EDNS EXTENDED ERROR handling [fedora-all] | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Tomas Hoger <thoger> |
| Component: | perl-Net-DNS | Assignee: | Paul Wouters <paul.wouters> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | urgent | Docs Contact: | |
| Priority: | urgent | ||
| Version: | 45 | CC: | jplesnik, mspacek, paul.wouters, perl-devel, rstrode |
| Target Milestone: | --- | Keywords: | Security, SecurityTracking |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | {"flaws": ["bc9a89c5-ade0-417b-8267-8c5b26db5153"]} | ||
| Fixed In Version: | perl-Net-DNS-1.56-1.fc45 perl-Net-DNS-1.56-1.fc44 perl-Net-DNS-1.56-1.fc43 | Doc Type: | --- |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2026-09-10 00:59:14 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 2502954 | ||
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle. Changing version to 45. FEDORA-2026-1237afef8a (perl-Net-DNS-1.56-1.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2026-1237afef8a FEDORA-2026-a0607111e6 (perl-Net-DNS-1.56-1.fc44) has been submitted as an update to Fedora 44. https://bodhi.fedoraproject.org/updates/FEDORA-2026-a0607111e6 FEDORA-2026-a0607111e6 has been pushed to the Fedora 44 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-a0607111e6` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-a0607111e6 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2026-1237afef8a has been pushed to the Fedora 43 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-1237afef8a` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-1237afef8a See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2026-a0607111e6 (perl-Net-DNS-1.56-1.fc44) has been pushed to the Fedora 44 stable repository. If problem still persists, please make note of it in this bug report. FEDORA-2026-1237afef8a (perl-Net-DNS-1.56-1.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report. |
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. 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.