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Code Issues Releases Wiki Activity

X25: Check that record is all ASCII digits

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This commit is contained in:
Mark Andrews 2020-08-13 14:13:49 +10:00
parent 9d446142d8
commit 7e49689746
1 changed files with 7 additions and 1 deletions
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8
lib/dns/rdata/generic/x25_19.c
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@ -59,6 +59,7 @@ totext_x25(ARGS_TOTEXT) {
static inline isc_result_t
fromwire_x25(ARGS_FROMWIRE) {
isc_region_t sr;
unsigned int i;
REQUIRE(type == dns_rdatatype_x25);
@ -68,9 +69,14 @@ fromwire_x25(ARGS_FROMWIRE) {
UNUSED(options);
isc_buffer_activeregion(source, &sr);
if (sr.length < 5) {
if (sr.length < 5 || sr.base[0] != (sr.length - 1)) {
return (DNS_R_FORMERR);
}
for (i = 1; i < sr.length; i++) {
if (sr.base[i] < 0x30 || sr.base[i] > 0x39) {
return (DNS_R_FORMERR);
}
}
return (txt_fromwire(source, target));
}