Bug 1529150 (CVE-2017-17850) - CVE-2017-17850 asterisk: Authenticated remote DOS via SIP contact header in PJSIP driver
Summary: CVE-2017-17850 asterisk: Authenticated remote DOS via SIP contact header in P...
Alias: CVE-2017-17850
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1529152 1529151
TreeView+ depends on / blocked
Reported: 2017-12-26 18:51 UTC by Pedro Sampaio
Modified: 2019-09-29 14:28 UTC (History)
4 users (show)

Fixed In Version: asterisk 13.18.5, asterisk 14.7.5, asterisk 15.1.5
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Clone Of:
Last Closed: 2019-06-08 03:34:59 UTC

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Description Pedro Sampaio 2017-12-26 18:51:43 UTC
An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older. A select set of SIP messages create a dialog in Asterisk. Those SIP messages must contain a contact header. For those messages, if the header was not present and the PJSIP channel driver was used, Asterisk would crash. The severity of this vulnerability is somewhat mitigated if authentication is enabled. If authentication is enabled, a user would have to first be authorized before reaching the crash point.

Upstream bug:




Comment 1 Pedro Sampaio 2017-12-26 18:52:18 UTC
Created asterisk tracking bugs for this issue:

Affects: epel-6 [bug 1529151]
Affects: fedora-all [bug 1529152]

Comment 2 Product Security DevOps Team 2019-06-08 03:34:59 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

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