mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-28 06:13:31 +01:00
Use strlcpy in create_unix_sockaddr()
Using strncpy meant that if listenaddress were ever >= sizeof(sockaddr_un.sun_path), we would fail to nul-terminate sun_path. This isn't a big deal: we never read sun_path, and the kernel is smart enough to reject the sockaddr_un if it isn't nul-terminated. Nonetheless, it's a dumb failure mode. Instead, we should reject addresses that don't fit in sockaddr_un.sun_path. Coverity found this; it's CID 428. Bugfix on 0.2.0.3-alpha.
This commit is contained in:
parent
46297bc7bd
commit
959da6b7f2
5
changes/cid_428
Normal file
5
changes/cid_428
Normal file
@ -0,0 +1,5 @@
|
||||
o Minor bugfixes:
|
||||
- Always NUL-terminate the sun_path field of a sockaddr_un before
|
||||
passing it to the kernel. (Not a security issue: kernels are
|
||||
smart enough to reject bad sockaddr_uns.) Found by Coverity; CID
|
||||
# 428. Bugfix on Tor 0.2.0.3-alpha.
|
@ -804,7 +804,13 @@ create_unix_sockaddr(const char *listenaddress, char **readable_address,
|
||||
|
||||
sockaddr = tor_malloc_zero(sizeof(struct sockaddr_un));
|
||||
sockaddr->sun_family = AF_UNIX;
|
||||
strncpy(sockaddr->sun_path, listenaddress, sizeof(sockaddr->sun_path));
|
||||
if (strlcpy(sockaddr->sun_path, listenaddress, sizeof(sockaddr->sun_path))
|
||||
>= sizeof(sockaddr->sun_path)) {
|
||||
log_warn(LD_CONFIG, "Unix socket path '%s' is too long to fit.",
|
||||
escaped(listenaddress));
|
||||
tor_free(sockaddr);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (readable_address)
|
||||
*readable_address = tor_strdup(listenaddress);
|
||||
|
Loading…
Reference in New Issue
Block a user