Net::DNS versions through 1.55 for Perl allow Denial of Service via deep DNS compression pointer chains. Net::DNS::DomainName::decode follows RFC 1035 compression pointers by recursing into itself w…
Summary
Net::DNS versions through 1.55 for Perl allow Denial of Service via deep DNS compression pointer chains. Net::DNS::DomainName::decode follows RFC 1035 compression pointers by recursing into itself with no depth limit. It is possible to construct a name which saturates the call stack (at least with larger TCP responses), leading to a potential Denial of Service. The guard `$link < $offset` prevents forward and circular chains, but still allows arbitrarily long backward chains. The per-offset c…
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Lint boundary warnings (3)
The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).
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REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes -
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://rt.cpan.org/Ticket/Display.html?id=179946 -
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56
Sources
- NVD DATABASE
Original Links
- https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes
- https://rt.cpan.org/Ticket/Display.html?id=179946
- https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56
- http://www.openwall.com/lists/oss-security/2026/07/20/13
Timeline
- nvd_ingest NVD