[asterisk-bugs] [JIRA] (ASTERISK-20884) [patch] build_route fails to parse Record-Route headers longer than 255 characters

[Matt Jordan (JIRA)]

Matt Jordan created ASTERISK-20884:
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             Summary: [patch] build_route fails to parse Record-Route headers longer than 255 characters
                 Key: ASTERISK-20884
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20884
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/Interoperability
    Affects Versions: 1.8.19.0
            Reporter: Corey Farrell
            Severity: Critical


build_route copies each Record-Route header to char rr_copy\[256\].  When the header is longer than this it cuts parts off.  This causes the header to be parsed wrong and the call fails to connect.

This issue was found when connecting with the SIP core of a large organization.  The SIP core provides a single Record-Route header with comma separated values.  My patch malloc's rr_copy to the exact length required for each header, freeing after each is processed.

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