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RRSIG: reject records with empty SIG section

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Mark Andrews 2020-08-17 11:21:41 +10:00 committed by Ondřej Surý
parent 3e743da1bd
commit f6d7b8c20d
1 changed files with 3 additions and 0 deletions
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3
lib/dns/rdata/generic/rrsig_46.c
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@ -311,6 +311,9 @@ fromwire_rrsig(ARGS_FROMWIRE) {
* Sig. * Sig.
*/ */
isc_buffer_activeregion(source, &sr); isc_buffer_activeregion(source, &sr);
if (sr.length < 1) {
return (DNS_R_FORMERR);
}
isc_buffer_forward(source, sr.length); isc_buffer_forward(source, sr.length);
return (mem_tobuffer(target, sr.base, sr.length)); return (mem_tobuffer(target, sr.base, sr.length));
} }