[sr-dev] kamailio 3.1.0 crash on ssl-dos attack
Jijo
realjijo at gmail.com
Wed Dec 7 20:57:17 CET 2011
Hi All..
Any comments/suggestions on this issue?
Thanks
Jijo
On Mon, Dec 5, 2011 at 6:56 PM, Jijo <realjijo at gmail.com> wrote:
> Hello
>
> I tested using 3.2 and i got the same error. I couldn't get the memlog,
> when i enable , the system doesn't come up.
>
> The latest update from http://www.thc.org/thc-ssl-dos/ says that
>
> "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 at 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
>>
>> OB151:~ # /usr/sbin/kamailio -V
>> version: kamailio 3.1.0 (i386/linux) 21a375
>> flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS,
>> USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, DBG_QM_MALLOC,
>> USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER,
>> USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
>> ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16,
>> MAX_URI_SIZE 1024, BUF_SIZE 65535, PKG_SIZE 15MB
>> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
>> id: 21a375
>> compiled on 09:22:51 Nov 4 2011 with gcc 4.5.0
>>
>>
>> OB151:~ # openssl version -a
>> OpenSSL 1.0.0 29 Mar 2010
>> built on: 2011-05-31 07:52:17.000000000 +0000
>> platform: linux-elf
>> options: bn(64,32) rc4(4x,int) des(ptr,risc1,16,long) blowfish(idx)
>> compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT
>> -DDSO_DLFCN -DHAVE_DLFCN_H
>> -DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall -fomit-frame-pointer
>> -fmessage-length=0 -O2 -Wall
>> -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables
>> -fasynchronous-unwind-tables -g -Wa,--noexecstack -fomit-frame-pointer
>> -fno-strict-aliasing
>> -DTERMIO -Wall -fstack-protector -DOPENSSL_BN_ASM_PART_WORDS
>> -DOPENSSL_IA32_SSE2
>> -DOPENSSL_BN_ASM_MONT -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM
>> -DRMD160_ASM -DAES_ASM -DWHIRLPOOL_ASM
>> OPENSSLDIR: "/etc/ssl"
>>
>>
>> On Wed, Nov 23, 2011 at 4:44 AM, Daniel-Constantin Mierla <
>> miconda at 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.
>>>
>>> Cheers,
>>> Daniel
>>>
>>>
>>> On 11/22/11 11:30 PM, Jijo wrote:
>>>
>>> Hi All,
>>>
>>> Kamailio is resetting when we do TLS renegotiation dos attack using the
>>> tool available at http://www.thc.org/thc-ssl-dos/.
>>>
>>> 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
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> sr-dev mailing listsr-dev at lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>>>
>>>
>>> --
>>> Daniel-Constantin Mierla -- http://www.asipto.com
>>> Kamailio Advanced Training, Dec 5-8, Berlin: http://asipto.com/u/kathttp://linkedin.com/in/miconda -- http://twitter.com/miconda
>>>
>>>
>>
>> --
>> Daniel-Constantin Mierla -- http://www.asipto.com
>> Kamailio Advanced Training, Dec 5-8, Berlin: http://asipto.com/u/kathttp://linkedin.com/in/miconda -- http://twitter.com/miconda
>>
>>
>
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