Hi,
There seems to be a bug in couriertls (~every version of courier-imap) that
causes it to segmentation fault if there are files with no dots in the
certificate directory (peer_cert_dir). Openssl likes to put files like Makefile
there for some strange reason.
Problem is at libcourierctl.c:496:
495: p=strrchr(de->d_name, '.');
496: if (!p[0] || !p[1])
497: continue;
498: while (*++p)
If there's no dot in the filename, there will be no p[0] nor p[1] and
the program will segmentation fault.
I guess a solution might be to just change
if (!p[0] || !p[1])
continue;
to
if (!p) continue;
Regards,
Tuomas Silen
P.S. I'm not subscribed so, please, keep me in Cc if replying.
Full debug output:
Program terminated with signal 11, Segmentation fault.
#0 0x0804d538 in tls_create ()
(gdb) bt full
#0 0x0804d538 in tls_create (isserver=1, info=0xbfbaa4e0) at
libcouriertls.c:496
p = 0x0
q = 0x80bd0e8 "(¿\n\b"
fp = (FILE *) 0x80c00e0
dirp = (DIR *) 0x80ba5c8
de = (struct dirent *) 0x80baba4
x = (X509 *) 0x0
ctx = (SSL_CTX *) 0x80607d0
protocol = 0xbfbaa890 "SSL3"
ssl_cipher_list = 0x0
session_timeout = 0
dhcertfile = 0x0
certfile = 0xbfbaa927 "/etc/ssl/certs/mail.imapd.pem"
s = 0xbfbaafb1 "::ffff:1.2.3.4"
stat_buf = {st_dev = 2051, __pad1 = 0, st_ino = 46658, st_mode = 16877,
st_nlink = 2, st_uid = 0, st_gid = 0, st_rdev = 0, __pad2 = 0, st_size = 4096,
st_blksize = 4096, st_blocks = 8, st_atim = {tv_sec = 1144808734,
tv_nsec = 0}, st_mtim = {tv_sec = 1144808734, tv_nsec = 0},
st_ctim = {tv_sec = 1144808734, tv_nsec = 0}, __unused4 = 0,
__unused5 = 0}
peer_cert_dir = 0xbfbaa83f "/etc/ssl/certs"
peer_cert_file = 0x0
n = 0
info_copy = (struct tls_info *) 0x80606d8
#1 0x0804b8c8 in dossl (fd=0, argn=3, argc=6, argv=0xbfbaa5f4) at
starttls.c:591
ctx = (SSL_CTX *) 0xbfbaa568
ssl = (SSL *) 0x48c35ff4
stdin_fd = -1208353984
stdout_fd = -1078287000
info = {peer_verify_domain = 0x0, connect_callback = 0x804b026
<verify_connection>, tls_err_msg = 0x804a790 <ssl_errmsg>,
getconfigvar = 0x804e860 <getenv_wrapper>, app_data = 0x0,
tlscache = 0x0, isserver = 0, connect_interrupted = 0, accept_interrupted = 0}
#2 0x0804c307 in main (argc=6, argv=0xbfbaa5f4) at starttls.c:858
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