"2011-OCT-24 UPDATE: SSL-DOS released. Some organizations already found out about this release a while ago and mistakenly identified it as an SSL-RENEGOTIATION BUG. This is not true. The tool can be modified to work without SSL-RENEGOTIATION by just establishing a new TCP connection for every new handshake. "
So this issue could happen if we do TCP connection for every new TLS connection with renegotiation. I believe this could be fixed if we could block based on max active TLS connections, probably a similar flag for max TLS connections like "tcp_max_connections"
Core was generated by `/usr/sbin/kamailio -u swrun -g sw -m
160 -f /etc/kamailio/kamailio.cfg'. Program terminated with signal 11,
Segmentation fault. #0 0xb61cc2e3 in ?? () from
/usr/lib/kamailio/modules/tls.so
(gdb) bt #0 0xb61cc2e3 in ?? () from
/usr/lib/kamailio/modules/tls.so #1 0xb65199fd in CRYPTO_lock () from
/lib/libcrypto.so.1.0.0 #2 0xb658c133 in ?? () from
/lib/libcrypto.so.1.0.0 #3 0xb658d240 in RAND_add () from
/lib/libcrypto.so.1.0.0 #4 0xb6690d50 in ssl3_accept () from
/lib/libssl.so.1.0.0 #5 0xb669bd2f in ssl3_read_bytes () from
/lib/libssl.so.1.0.0 #6 0xb66989b9 in ?? () from /lib/libssl.so.1.0.0 #7
0xb66ae499 in SSL_read () from /lib/libssl.so.1.0.0 #8 0xb61e1e33 in
tls_read_f () from /usr/lib/kamailio/modules/tls.so #9 0x08177036 in
tcp_read_headers () #10 0x081771f6 in tcp_read_req () #11 0x08178480 in ??
() #12 0x0817af77 in tcp_receive_loop () #13 0x08173597 in
tcp_init_children () #14 0x080b20bf in main_loop () #15 0x080b38c3 in main
() (gdb)
On Wed, Nov 23, 2011 at 10:35 AM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:
Hello,
3.1.0 is not the right choice in 3.1 series, there were many fixes
that were added to that release series branch. The latest stable
version there is 3.1.5. Try with it (even better, try with latest
version from git branch 3.1 -- see
http://www.kamailio.org/dokuwiki/doku.php/install:kamailio-3.1.x-from-git)
In this way we are sure it is not a bug that was fixed after the
time of releasing 3.1.0 -- config file and database is the same as
for 3.1.0.
Cheers,
Daniel
On 11/23/11 4:01 PM, Jijo wrote:
Thanks I will attach the logs soon..meanwhile here is
the kamailio and openssl version
On Wed, Nov 23, 2011 at 4:44 AM,
Daniel-Constantin Mierla <miconda@gmail.com>
wrote:
Hello,
(discussion kept only on sr-dev as it is very likely going
to require mostly devel interaction).
What is the version of kamailio (-V command line option).
Also, send the verision of openssl library -- there were
many bugs in various lib versions that had to be
workarounded in the module, maybe this is a new one that has
to be fixed.
Do you get any error message in the syslog at the moment of
the crash?
What would be useful is to get the memory operations log,
you can get it by setting:
memdbg=1
memlog=1
in config file.
Then repeat the test and make the log available for download
somehow (if it is too big), from start to the moment of the
crash.
Anybody looked at this issue? How we could resolve it.
Any idea?
The core generated for 3 pid's as below
Pid 1:
Core was generated by `/usr/sbin/kamailio -u swrun -g
sw -m 120 -f /etc/kamailio/kamailio.cfg'.
Program terminated with signal 11, Segmentation fault.
#0 atomic_inc_int () at atomic/atomic_x86.h:225
(gdb) bt
#0 atomic_inc_int () at atomic/atomic_x86.h:225
#1 cfg_update_local () at cfg/cfg_struct.h:228
#2 timer_main () at timer.c:994
#3 0x080b0579 in main_loop () at main.c:1632
#4 0x080b1be4 in main (argc=9, argv=0xbfd61e54) at
main.c:2446
Pid 2:
Core was generated by `/usr/sbin/kamailio -u swrun -g
sw -m 120 -f /etc/kamailio/kamailio.cfg'.
Program terminated with signal 11, Segmentation fault.
#0 0x0819bfe8 in qm_insert_free (qm=0xaf6c5000,
p=0xb05eec30, file=0xb6fb4140 "tls: tls_init.c",
func=0xb6fb4ce0 "ser_free", line=296)
at mem/q_malloc.c:184
184 if (frag->size <=
f->size) break;
(gdb) bt
#0 0x0819bfe8 in qm_insert_free (qm=0xaf6c5000,
p=0xb05eec30, file=0xb6fb4140 "tls: tls_init.c",
func=0xb6fb4ce0 "ser_free", line=296)
at mem/q_malloc.c:184
#1 qm_free (qm=0xaf6c5000, p=0xb05eec30,
file=0xb6fb4140 "tls: tls_init.c", func=0xb6fb4ce0
"ser_free", line=296) at mem/q_malloc.c:518
#2 0xb6f95404 in ser_free (ptr=0xb05eec30) at
tls_init.c:296
#3 0xb732e9ba in CRYPTO_free (str=0xb05eec30) at
mem.c:391
#4 0xb7330bee in int_new_ex_data (class_index=5,
obj=0xbfd414f4, ad=0xbfd41574) at ex_data.c:440
#5 0xb7330443 in CRYPTO_new_ex_data (class_index=5,
obj=0xbfd414f4, ad=0xbfd41574) at ex_data.c:575
#6 0xb73dfde3 in X509_STORE_CTX_init (ctx=0xbfd414f4,
store=0xafd8b3d0, x509=0xafe08ff0, chain=0x0) at
x509_vfy.c:2114
#7 0xb74b0f31 in ssl3_output_cert_chain
(s=0xb0553a10, x=0xafe08ff0) at s3_both.c:349
#8 0xb74a4728 in ssl3_send_server_certificate
(s=0xb0553a10) at s3_srvr.c:3034
#9 0xb74a5879 in ssl3_accept (s=0xb0553a10) at
s3_srvr.c:353
#10 0xb74afa8f in ssl3_read_bytes (s=0xb0553a10,
type=23, buf=0xb0ad44ec "", len=4095, peek=0) at
s3_pkt.c:1266
#11 0xb74ac9c9 in ssl3_read_internal (s=0xb0553a10,
buf=0xb0ad44ec, len=4095, peek=0) at s3_lib.c:3265
#12 0xb74c24a9 in SSL_read (s=0xb0553a10,
buf=0xb0ad44ec, num=4095) at ssl_lib.c:954
#13 0xb6fad1c3 in tls_read_f (c=0xb0ad431c,
flags=0xbfd619c4) at tls_server.c:1058
#14 0x08171c0e in tcp_read_headers (c=0xb0ad431c,
read_flags=0xbfd619c4) at tcp_read.c:406
#15 0x08171db8 in tcp_read_req (con=0xb0ad431c,
bytes_read=0xbfd619cc, read_flags=0xbfd619c4) at
tcp_read.c:885
#16 0x08172f67 in handle_io (fm=<value optimized
out>, events=1, idx=<value optimized out>) at
tcp_read.c:1234
#17 0x0817583b in io_wait_loop_epoll (unix_sock=89) at
io_wait.h:1092
#18 tcp_receive_loop (unix_sock=89) at tcp_read.c:1345
#19 0x0816e2e9 in tcp_init_children () at
tcp_main.c:4867
#20 0x080affb1 in main_loop () at main.c:1646
#21 0x080b1be4 in main (argc=9, argv=0xbfd61e54) at
main.c:2446
Pid 3:
Core was generated by `/usr/sbin/kamailio -u swrun -g
sw -m 120 -f /etc/kamailio/kamailio.cfg'.
Program terminated with signal 11, Segmentation fault.
#0 0xb76c9e7c in memmove () from /lib/libc.so.6
(gdb) bt
#0 0xb76c9e7c in memmove () from /lib/libc.so.6
#1 0x081724e7 in tcp_read_req (con=0xb022c8f0,
bytes_read=0xbfd619cc, read_flags=0xbfd619c4) at
tcp_read.c:1026
#2 0x08172f67 in handle_io (fm=<value optimized
out>, events=1, idx=<value optimized out>) at
tcp_read.c:1234
#3 0x0817583b in io_wait_loop_epoll (unix_sock=93) at
io_wait.h:1092
#4 tcp_receive_loop (unix_sock=93) at tcp_read.c:1345
#5 0x0816e2e9 in tcp_init_children () at
tcp_main.c:4867
#6 0x080affb1 in main_loop () at main.c:1646
#7 0x080b1be4 in main (argc=9, argv=0xbfd61e54) at
main.c:2446