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Fix proxyprotocol target field (#496)

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This commit is contained in:
Yves Rutschle 2025-05-29 15:14:28 +02:00
parent b12220e640
commit ad66e79f46
2 changed files with 26 additions and 7 deletions
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3
ChangeLog
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@ -1,3 +1,6 @@
vNEXT:
Fix proxyprotocol target field (Thanks to Github user 404-Not-Found)
v2.2.4:
Fix CVE-2025-46806 for "Misaligned Memory Accesses in `is_openvpn_protocol()`"

30
proxyprotocol.c
View File

@ -50,22 +50,38 @@ static int family_to_pp(int af_family)
typedef char libpp_addr[108]; /* This is hardcoded in libproxyprotocol/proxy_protocol.h */
typedef enum {
PEER,
SOCK
} sockpeer_t;
/* Fills *addr, *host and *serv with the connection information corresponding
* to fd. *host is the IP address as string and *serv is the service (port)
* to fd. sockpeer indicates if if is filled with the remote, or local, part of
* the socket.
* *host is the IP address as string and *serv is the service (port)
* */
static int get_info(int fd, struct addrinfo* addr, libpp_addr* host, uint16_t* serv)
static int get_info(int fd, sockpeer_t sockpeer, struct addrinfo* addr, libpp_addr* host, uint16_t* serv)
{
char serv_str[NI_MAXSERV];
int res;
res = getpeername(fd, addr->ai_addr, &addr->ai_addrlen);
CHECK_RES_RETURN(res, "getpeername", -1);
if (sockpeer == PEER) {
res = getpeername(fd, addr->ai_addr, &addr->ai_addrlen);
CHECK_RES_RETURN(res, "getpeername", -1);
} else {
res = getsockname(fd, addr->ai_addr, &addr->ai_addrlen);
CHECK_RES_RETURN(res, "getsockname", -1);
}
res = getnameinfo(addr->ai_addr, addr->ai_addrlen,
(char*)host, sizeof(*host),
serv_str, sizeof(serv_str),
NI_NUMERICHOST | NI_NUMERICSERV );
CHECK_RES_RETURN(res, "getnameinfo", -1);
if (res != 0) {
print_message(msg_system_error, "getnameinfo: %s\n", gai_strerror(res));
return -1;
}
*serv = atoi(serv_str);
@ -89,14 +105,14 @@ int pp_write_header(int pp_version, struct connection* cnx)
addr.ai_addr = (struct sockaddr*)&ss;
addr.ai_addrlen = sizeof(ss);
res = get_info(cnx->q[0].fd,
res = get_info(cnx->q[0].fd, PEER,
&addr,
&pp_info_in_v1.src_addr,
&pp_info_in_v1.src_port);
if (res == -1) return -1;
pp_info_in_v1.address_family = family_to_pp(addr.ai_addr->sa_family);
res = get_info(cnx->q[1].fd,
res = get_info(cnx->q[1].fd, SOCK,
&addr,
&pp_info_in_v1.dst_addr,
&pp_info_in_v1.dst_port