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Fix an out-of-bounds memory access when parsing PTR records

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dmiller
2021-04-27 19:22:08 +00:00
parent c9b7c2f590
commit 3adaa69cb2
1 changed files with 2 additions and 2 deletions
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4
nmap_dns.cc
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@@ -1361,7 +1361,7 @@ bool DNS::Factory::ptrToIp(const std::string &ptr, sockaddr_storage &ip)
size_t i = 0; size_t i = 0;
p--; p--;
while (i < sizeof(ip4->sin_addr.s_addr)) while (p >= cptr && i < sizeof(ip4->sin_addr.s_addr))
{ {
if (*p == '.') if (*p == '.')
{ {
@@ -1394,7 +1394,7 @@ bool DNS::Factory::ptrToIp(const std::string &ptr, sockaddr_storage &ip)
size_t i=0; size_t i=0;
p--; p--;
while (i < sizeof(ip6->sin6_addr.s6_addr)) while (p >= cptr && i < sizeof(ip6->sin6_addr.s6_addr))
{ {
if (*p == '.') if (*p == '.')
{ {