All IPv4 ICMP parameters can be found at http://www.iana.org/assignments/icmp-parameters. Table 4-1. ICMPv6 error messages and code type Message number Message type Code field 1 Destination Unreachable 0 = no route to destination 1 = communication with destination administratively prohibited 2 ...
Furthermore, we found that ICMPv6 rate-limiting implementations, used to protect routers, allow the fingerprinting of vendors and OS-versions. This enabled us to detect more than a million periphery routers relying on Linux kernels from 2018 (or before); these kernels have reached end of life ...
* >0 : Successfully found an interface with Global/Unique local IPv6 address. * -1 : Unable to to find a valid interface with Global/Unique local IPv6 address. */ bool get_src_iface(char *interface, char *src_addr_str) { esp_netif_t *netif = NULL; int ip6_addrs_count = 0; ...
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source This vulnerability was found during internal security testing.
// if no state is found the packet is tested action = pf_test_rule(&pd, &r, &s, &a, &ruleset, &reason); } break; } case IPPROTO_ICMPV6: { if (action == PF_PASS || action == PF_AFRT) { } else if (s == NULL) { ...
// if a valid state is found the packet might go there // without being tested against the filtering rules r = s->rule.ptr; a = s->anchor.ptr; pd.pflog |= s->log; } else if (s == NULL) { // if no state is found the packet is tested ...
In case the protocol type cannot be found in the body of the ICMPv6 message (because there were too many extension headers present in the original packet, and the part of the header that contained the upper-layer protocol type was truncated), the ICMPv6 message is silently discarded. An ...