The IAX2 channel driver (chan_iax2) in Asterisk Open 1.2.x before 1.2.23, 1.4.x before 1.4.9, and Asterisk Appliance Developer Kit before 0…
The IAX2 channel driver (chan_iax2) in Asterisk Open 1.2.x before 1.2.23, 1.4.x before 1.4.9, and Asterisk Appliance Developer Kit before 0.6.0, when configured to allow unauthenticated calls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of calls that do not complete a 3-way handshake, which causes an ast_channel to be allocated but not released.
The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.
https://cwe.mitre.org/data/definitions/772.html →Open in CWE collection →An attacker performs flooding at the HTTP level to bring down only a particular web application rather than anything listening on a TCP/IP connection. This denial of service attack requires substantially fewer packets to be sent which makes DoS harder to detect. This is an equivalent of SYN flood in HTTP. The idea is to keep the HTTP session alive indefinitely and then repeat that hundreds of times. This attack targets resource depletion weaknesses in web server software. The web server will wait to attacker's responses on the initiated HTTP sessions while the connection threads are being exhausted.
https://capec.mitre.org/data/definitions/469.html →Open in CAPEC collection →| Product | Vendor | Status |
|---|---|---|
| asterisk | Tracked | |
| asterisk | Tracked | |
| asterisk | Tracked | |
| asterisk | * | Tracked |
| asterisk_appliance_developer_kit | * | Tracked |