[asterisk-bugs] [JIRA] (ASTERISK-22910) REPLACE() calls strcpy on overlapping memory when <replace-char> is empty

[Gareth Palmer (JIRA)]

Gareth Palmer created ASTERISK-22910:
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             Summary: REPLACE() calls strcpy on overlapping memory when <replace-char> is empty
                 Key: ASTERISK-22910
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-22910
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Functions/func_strings
    Affects Versions: 12.0.0-beta2, 11.6.0
            Reporter: Gareth Palmer
            Severity: Minor
         Attachments: func_strings.patch

When calling REPLACE() with an empty replace-char argument; strcpy is used to overwrite the the matching <find-char>.

However as the src and dest argument to strcpy must not overlap it causes other parts of the string to be overwritten with adjacent characters and the result is mangled.

Patch replaces call to strcpy with memmove and adds a test suite case for REPLACE.

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