Last Modified: Mar 17, 2021
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Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3, 126.96.36.199, 188.8.131.52, 184.108.40.206, 220.127.116.11, 11.6.4, 11.6.5, 18.104.22.168, 22.214.171.124, 126.96.36.199
Opened: Jul 07, 2015
The SIP parser is designed to drop incorrectly formatted messages. In certain cases, the parser is unable to resume parsing once the incorrect message is dropped.
In certain setups where a connection is used for multiple messages or calls, a bad message could keep subsequent messages from being forwarded.
If multiple messages are received on the same connections, an incorrect messing on the connection may clog the parser and subsequent messages will not be parsed.
After a dropped message, parser is returned to a state where it is waiting for the next message.