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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HTTPCLIENT-1319) InetAddressUtils.isIPv6HexCompressedAddress does not detect excess (or insufficient) groups
Date Thu, 04 Apr 2013 09:53:16 GMT

    [ https://issues.apache.org/jira/browse/HTTPCLIENT-1319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13621977#comment-13621977
] 

Oleg Kalnichevski commented on HTTPCLIENT-1319:
-----------------------------------------------

Sounds worthwhile to me. I would be really great if you could take care of it.

Oleg
                
> InetAddressUtils.isIPv6HexCompressedAddress does not detect excess (or insufficient)
groups
> -------------------------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-1319
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1319
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>    Affects Versions: 4.3 Alpha1
>            Reporter: Sebb
>            Priority: Minor
>             Fix For: 4.3 Final
>
>
> The IPV6 compressed format regex allows 0 or more hex groups before or after the ::.
> This does not detect too many groups (there should be at most 7 surrounding groups in
total).
> It also allows no groups, i.e "::" which is not permitted AFAIK.
> The first issue could be detected by counting the number of ':' characters in the string.

> There should be no more than 7 colons.
> The empty group could be detected by checking the length of the string - it must be at
least 3 characters.
> That should probably be tested first as it is relatively cheap.

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