메뉴 건너뛰기

GREATUSER

cve

CVE-2017-14099

관리자 2017.09.04 21:00 조회 수 : 13

In res/res_rtp_asterisk.c in Asterisk 11.x before 11.25.2, 13.x before 13.17.1, and 14.x before 14.6.1 and Certified Asterisk 11.x before 11.6-cert17 and 13.x before 13.13-cert5, unauthorized data disclosure (media takeover in the RTP stack) is possible with careful timing by an attacker. The "strictrtp" option in rtp.conf enables a feature of the RTP stack that learns the source address of media for a session and drops any packets that do not originate from the expected address. This option is enabled by default in Asterisk 11 and above. The "nat" and "rtp_symmetric" options (for chan_sip and chan_pjsip, respectively) enable symmetric RTP support in the RTP stack. This uses the source address of incoming media as the target address of any sent media. This option is not enabled by default, but is commonly enabled to handle devices behind NAT. A change was made to the strict RTP support in the RTP stack to better tolerate late media when a reinvite occurs. When combined with the symmetric RTP support, this introduced an avenue where media could be hijacked. Instead of only learning a new address when expected, the new code allowed a new source address to be learned at all times. If a flood of RTP traffic was received, the strict RTP support would allow the new address to provide media, and (with symmetric RTP enabled) outgoing traffic would be sent to this new address, allowing the media to be hijacked. Provided the attacker continued to send traffic, they would continue to receive traffic as well.


원문출처 : https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-14099
번호 제목 글쓴이 날짜 조회 수
437 CVE-2016-3223 관리자 2016.06.17 11
436 CVE-2018-1000013 관리자 2018.01.25 10
435 CVE-2017-17407 관리자 2018.01.25 10
434 CVE-2018-6002 관리자 2018.01.25 10
433 CVE-2016-10709 관리자 2018.01.25 10
432 CVE-2016-10708 관리자 2018.01.25 10
431 CVE-2017-12115 관리자 2018.01.25 10
430 CVE-2017-14096 관리자 2018.01.25 10
429 CVE-2017-14097 관리자 2018.01.25 10
428 CVE-2018-5784 관리자 2018.01.25 10
427 CVE-2017-14116 관리자 2017.09.04 10
426 CVE-2017-0143 관리자 2017.03.18 10
425 CVE-2017-18048 관리자 2018.01.25 9
424 CVE-2018-6003 관리자 2018.01.25 9
423 CVE-2017-17858 관리자 2018.01.25 9
위로