An issue was discovered in channels/chansip.c in Sangoma Asterisk 13.x before 13.29.2, 16.x before 16.6.2, and 17.x before 17.0.1, and Certified Asterisk 13.21 before cert5. A SIP request can be sent to Asterisk that can change a SIP peer's IP address. A REGISTER does not need to occur, and calls can be hijacked as a result. The only thing that needs to be known is the peer's name; authentication details such as passwords do not need to be known. This vulnerability is only exploitable when the nat option is set to the default, or autoforce_rport.
{
"versions": [
{
"introduced": "13.0.0"
},
{
"fixed": "13.29.2"
},
{
"introduced": "16.0.0"
},
{
"fixed": "16.6.2"
},
{
"introduced": "17.0.0"
},
{
"fixed": "17.0.1"
},
{
"introduced": "0"
},
{
"last_affected": "13.21.0"
},
{
"introduced": "0"
},
{
"last_affected": "13.21.0-rc1"
}
]
}"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-18790.json"
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