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EUVD-2026-355416

fkie_cve-2026-54543

Froxlor is open source server administration software. Prior to 2.3.8, the DomainZones.add API command in lib/Froxlor/Api/Commands/DomainZones.php accepts user-controlled record and type values without rejecting line delimiters, tab characters, semicolons, or unsupported DNS record types before lib/Froxlor/Dns/DnsEntry.php serializes the values into a BIND zone file. An authenticated customer with DNS-zone permissions can place a crafted value in the record field, or use the related type-field variant, to create additional resource-record lines that bypass Froxlor's field-level validation. BIND accepts the injected records, allowing modification of DNS data and possible DNS availability impact within a zone the caller is authorized to manage. This issue is fixed in version 2.3.8.

GHSA-5rw4-4665-cvwf — Froxlor DomainZones.add allows DNS zone-file RR injection via record/type fields

Affected: Packagist: froxlor/froxlor

Froxlor's DomainZones.add API command accepts user-controlled DNS record and type values and later writes them into generated BIND zone files without rejecting line delimiters, tab characters, or zone-file comment delimiters.

The stronger variant is in record. An authenticated customer with DNS-zone permissions can submit a normal A record request where record is:

www\t60\tIN\tA\t6.6.6.6 ;\n@

with type=A and content=127.0.0.1. The current record flow trims/lower-cases/IDNA-encodes the value, but does not reject CR/LF/HTAB or semicolon. The real Froxlor\Dns\DnsEntry::__toString() sink renders it as:

www 60 in a 6.6.6.6 ; @ 18000 IN A 127.0.0.1

BIND accepts the generated zone file:

named-checkzone example.com froxlor_dns_record_injected.zone zone example.com/IN: loaded serial 2026060501 OK

named-compilezone -D confirms both records are parsed as real DNS RRs:

example.com. 18000 IN A 127.0.0.1 www.example.com. 60 IN A 6.6.6.6 zone example.com/IN: loaded serial 2026060501 OK

Affected code in 2.3.7: - lib/Froxlor/Api/Commands/DomainZones.php:92-93 reads record/type from API params. - lib/Froxlor/Api/Commands/DomainZones.php:122-136 trims/lower-cases/IDNA-encodes record without control-character rejection. - lib/Froxlor/Api/Commands/DomainZones.php:157-160 hardens content only. - lib/Froxlor/Api/Commands/DomainZones.php:314-321 and 347-357 store record/type/content into domain_dns_entries. - lib/Froxlor/Dns/Dns.php:297 passes stored value…

WID-SEC-W-2026-2113 — Froxlor: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Froxlor ausnutzen, um Cross-Site-Scripting- oder SQL-Injection-Angriffe durchzuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder vertrauliche Informationen offenzulegen, was möglicherweise weitere Angriffe ermöglicht.