/ 
Net-DNS-0.38_01 UNAUTHORIZED RELEASE
/ Net::DNS::RR::LOC
Security Advisories (5)
CVE-2007-6341 (2008-02-08)

Allows remote attackers to cause a denial of service (program "croak") via a crafted DNS response.

CVE-2007-3409 (2007-06-26)

Net::DNS before 0.60, a Perl module, allows remote attackers to cause a denial of service (stack consumption) via a malformed compressed DNS packet with self-referencing pointers, which triggers an infinite loop.

CVE-2007-3377 (2007-06-25)

Header.pm in Net::DNS before 0.60, a Perl module, (1) generates predictable sequence IDs with a fixed increment and (2) can use the same starting ID for all child processes of a forking server, which allows remote attackers to spoof DNS responses, as originally reported for qpsmtp and spamassassin.

CVE-2026-64193 (2026-07-20)

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.

CVE-2026-64194 (2026-07-20)

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 < $offset` prevents forward and circular chains, but still allows arbitrarily long backward chains. The per-offset cache (`$cache`) is populated at the start of each call and short-circuits only re-traverses of the same offset - the initial descent through a fresh chain still recurses at full depth. A crafted packet can chain two-byte compression pointers so that each one points two bytes earlier than the previous, producing a chain length of `offset / 2`. For the 14-bit pointer field (max offset 16383) this gives up to ~8191 recursive frames. For a TCP DNS message the limit is the 16-bit length field (~32767 frames). Perl's default C stack handles only a few thousand frames; beyond that the process receives SIGSEGV or similar, which is a denial-of-service for any application parsing untrusted DNS data. The vulnerability is triggered by `Net::DNS::Packet->new(\$wire)` i.e. any point where the library decodes a DNS message from the network.

NAME

Net::DNS::RR::LOC - DNS LOC resource record

SYNOPSIS

use Net::DNS::RR;

DESCRIPTION

Class for DNS Location (LOC) resource records. See RFC 1876 for details.

METHODS

version

print "version = ", $rr->version, "\n";

Returns the version number of the representation; programs should always check this. Net::DNS currently supports only version 0.

size

print "size = ", $rr->size, "\n";

Returns the diameter of a sphere enclosing the described entity, in centimeters.

horiz_pre

print "horiz_pre = ", $rr->horiz_pre, "\n";

Returns the horizontal precision of the data, in centimeters.

vert_pre

print "vert_pre = ", $rr->vert_pre, "\n";

Returns the vertical precision of the data, in centimeters.

latitude

print "latitude = ", $rr->latitude, "\n";

Returns the latitude of the center of the sphere described by the size method, in thousandths of a second of arc. 2**31 represents the equator; numbers above that are north latitude.

longitude

print "longitude = ", $rr->longitude, "\n";

Returns the longitude of the center of the sphere described by the size method, in thousandths of a second of arc. 2**31 represents the prime meridian; numbers above that are east longitude.

latlon

($lat, $lon) = $rr->latlon;
system("xearth", "-pos", "fixed $lat $lon");

Returns the latitude and longitude as floating-point degrees. Positive numbers represent north latitude or east longitude; negative numbers represent south latitude or west longitude.

altitude

print "altitude = ", $rr->altitude, "\n";

Returns the altitude of the center of the sphere described by the size method, in centimeters, from a base of 100,000m below the WGS 84 reference spheroid used by GPS.

COPYRIGHT

Copyright (c) 1997-1998 Michael Fuhr. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

Some of the code and documentation is based on RFC 1876 and on code contributed by Christopher Davis.

SEE ALSO

perl(1), Net::DNS, Net::DNS::Resolver, Net::DNS::Packet, Net::DNS::Header, Net::DNS::Question, Net::DNS::RR, RFC 1876