high
7.5
CWE
200
Advisory Published
Updated

CVE-2017-14099: Infoleak

First published: Sat Sep 02 2017(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Asterisk=13.0.0
Asterisk=13.0.0-beta1
Asterisk=13.0.0-beta2
Asterisk=13.0.0-beta3
Asterisk=13.0.1
Asterisk=13.0.2
Asterisk=13.1.0
Asterisk=13.1.0-rc1
Asterisk=13.1.0-rc2
Asterisk=13.1.1
Asterisk=13.2.0
Asterisk=13.2.0-rc1
Asterisk=13.2.1
Asterisk=13.3.0-rc1
Asterisk=13.3.2
Asterisk=13.4.0
Asterisk=13.4.0-rc1
Asterisk=13.5.0
Asterisk=13.5.0-rc1
Asterisk=13.6.0-rc1
Asterisk=13.7.0-rc1
Asterisk=13.7.0-rc2
Asterisk=13.7.1
Asterisk=13.7.2
Asterisk=13.8.0
Asterisk=13.8.0-rc1
Asterisk=13.8.1
Asterisk=13.8.2
Asterisk=13.9.0
Asterisk=13.9.1
Asterisk=13.10.0
Asterisk=13.10.0-rc1
Asterisk=13.11.0
Asterisk=13.11.1
Asterisk=13.11.2
Asterisk=13.12
Asterisk=13.12.0
Asterisk=13.12.1
Asterisk=13.12.2
Asterisk=13.13
Asterisk=13.13.0
Asterisk=13.13.1
Asterisk=13.14.0
Asterisk=13.14.0-rc1
Asterisk=13.14.0-rc2
Asterisk=13.14.1
Asterisk=13.15.0
Asterisk=13.15.0-rc1
Asterisk=13.15.0-rc2
Asterisk=13.15.0-rc3
Asterisk=13.15.1
Asterisk=13.16.0
Asterisk=13.16.0-rc1
Asterisk=13.16.0-rc2
Asterisk=13.17.0
Asterisk=13.17.0-rc1
Asterisk=14.0
Asterisk=14.0.0
Asterisk=14.0.0-beta1
Asterisk=14.0.0-beta2
Asterisk=14.0.0-rc1
Asterisk=14.0.0-rc2
Asterisk=14.0.1
Asterisk=14.0.2
Asterisk=14.1
Asterisk=14.01
Asterisk=14.1.0
Asterisk=14.1.1
Asterisk=14.1.2
Asterisk=14.02
Asterisk=14.2
Asterisk=14.2.0
Asterisk=14.2.1
Asterisk=14.3.0
Asterisk=14.3.0-rc1
Asterisk=14.3.0-rc2
Asterisk=14.3.1
Asterisk=14.4.0
Asterisk=14.4.0-rc1
Asterisk=14.4.0-rc2
Asterisk=14.4.0-rc3
Asterisk=14.4.1
Asterisk=14.5.0
Asterisk=14.5.0-rc1
Asterisk=14.5.0-rc2
Asterisk=14.6.0
Asterisk=14.6.0-rc1
Asterisk=11.0.0
Asterisk=11.0.0-beta1
Asterisk=11.0.0-beta2
Asterisk=11.0.0-rc1
Asterisk=11.0.0-rc2
Asterisk=11.0.1
Asterisk=11.0.2
Asterisk=11.1.0
Asterisk=11.1.0-rc1
Asterisk=11.1.0-rc2
Asterisk=11.1.0-rc3
Asterisk=11.1.1
Asterisk=11.1.2
Asterisk=11.2.0-rc1
Asterisk=11.2.1
Asterisk=11.2.2
Asterisk=11.4.0-rc4
Asterisk=11.6.0
Asterisk=11.6.0-rc1
Asterisk=11.6.0-rc2
Asterisk=11.6.1
Asterisk=11.7.0
Asterisk=11.7.0-rc1
Asterisk=11.7.0-rc2
Asterisk=11.8.0
Asterisk=11.8.0-rc1
Asterisk=11.8.0-rc2
Asterisk=11.8.0-rc3
Asterisk=11.8.1
Asterisk=11.9.0
Asterisk=11.9.0-rc1
Asterisk=11.9.0-rc2
Asterisk=11.9.0-rc3
Asterisk=11.10.0
Asterisk=11.10.0-rc1
Asterisk=11.10.1
Asterisk=11.10.1-rc1
Asterisk=11.10.2
Asterisk=11.11.0
Asterisk=11.11.0-rc1
Asterisk=11.12.0
Asterisk=11.12.0-rc1
Asterisk=11.12.1
Asterisk=11.13.0
Asterisk=11.13.0-rc1
Asterisk=11.13.1
Asterisk=11.14.0
Asterisk=11.14.0-rc1
Asterisk=11.14.0-rc2
Asterisk=11.14.1
Asterisk=11.14.2
Asterisk=11.15.0-rc1
Asterisk=11.15.0-rc2
Asterisk=11.15.1
Asterisk=11.16.0-rc1
Asterisk=11.17.0-rc1
Asterisk=11.17.1
Asterisk=11.18.0
Asterisk=11.18.0-rc1
Asterisk=11.19.0-rc1
Asterisk=11.20.0-rc1
Asterisk=11.21.0-rc1
Asterisk=11.21.0-rc2
Asterisk=11.21.1
Asterisk=11.21.2
Asterisk=11.22.0
Asterisk=11.22.0-rc1
Asterisk=11.23.0
Asterisk=11.23.0-rc1
Asterisk=11.23.1
Asterisk=11.24.0
Asterisk=11.24.1
Asterisk=11.25.0
Asterisk=11.25.1
Asterisk Certified Asterisk=11.6-cert1
Asterisk Certified Asterisk=11.6-cert1_rc1
Asterisk Certified Asterisk=11.6-cert1_rc2
Asterisk Certified Asterisk=11.6-cert10
Asterisk Certified Asterisk=11.6-cert11
Asterisk Certified Asterisk=11.6-cert12
Asterisk Certified Asterisk=11.6-cert13
Asterisk Certified Asterisk=11.6-cert14
Asterisk Certified Asterisk=11.6-cert14_rc1
Asterisk Certified Asterisk=11.6-cert14_rc2
Asterisk Certified Asterisk=11.6-cert15
Asterisk Certified Asterisk=11.6-cert16
Asterisk Certified Asterisk=11.6-cert2
Asterisk Certified Asterisk=11.6-cert3
Asterisk Certified Asterisk=11.6-cert4
Asterisk Certified Asterisk=11.6-cert5
Asterisk Certified Asterisk=11.6-cert6
Asterisk Certified Asterisk=11.6-cert7
Asterisk Certified Asterisk=11.6-cert8
Asterisk Certified Asterisk=11.6-cert9
Asterisk Certified Asterisk=13.13-cert1
Asterisk Certified Asterisk=13.13-cert1_rc1
Asterisk Certified Asterisk=13.13-cert1_rc2
Asterisk Certified Asterisk=13.13-cert1_rc3
Asterisk Certified Asterisk=13.13-cert1_rc4
Asterisk Certified Asterisk=13.13-cert2
Asterisk Certified Asterisk=13.13-cert3
Asterisk Certified Asterisk=13.13-cert4

Remedy

https://bugs.debian.org/873907

Remedy

https://issues.asterisk.org/jira/browse/ASTERISK-27013

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2017-14099?

    CVE-2017-14099 has been rated as a medium severity vulnerability, allowing for unauthorized data disclosure.

  • How do I fix CVE-2017-14099?

    To fix CVE-2017-14099, update Asterisk to version 11.25.2, 13.17.1, 14.6.1, or higher.

  • What software versions are affected by CVE-2017-14099?

    CVE-2017-14099 affects Asterisk versions 11.x before 11.25.2, 13.x before 13.17.1, and 14.x before 14.6.1.

  • What type of attack is possible with CVE-2017-14099?

    CVE-2017-14099 allows for a media takeover attack in the RTP stack through unauthorized data disclosure.

  • Is there a patch available for CVE-2017-14099?

    Yes, patches are available for CVE-2017-14099 in the updated versions of Asterisk released after the vulnerability was identified.

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