|Date: (C)2011-10-21 (M)2017-08-29|
|CVSS Score: 6.8||Access Vector: NETWORK|
|Exploitability Subscore: 8.0||Access Complexity: LOW|
|Impact Subscore: 6.9||Authentication: SINGLE_INSTANCE|
| ||Confidentiality: NONE|
| ||Integrity: NONE|
| ||Availability: COMPLETE|
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.8.x before 220.127.116.11 and 10.x before 10.0.0-rc1 does not properly initialize variables during request parsing, which allows remote authenticated users to cause a denial of service (daemon crash) via a malformed request.