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https://issues.apache.org/jira/browse/HTTPCLIENT-1319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sebb resolved HTTPCLIENT-1319.
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Resolution: Fixed
> InetAddressUtils.isIPv6HexCompressedAddress does not detect excess groups
> -------------------------------------------------------------------------
>
> Key: HTTPCLIENT-1319
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1319
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Affects Versions: 4.2.3, 4.3 Alpha1
> Reporter: Sebb
> Priority: Minor
> Fix For: 4.2.4, 4.3 Final
>
>
> The IPV6 compressed format regex allows 0-6 hex groups before and 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. [Edit: this
> is allowed, see http://tools.ietf.org/html/rfc4291#section-2.2]
> The first issue could be detected by counting the number of ':' characters in
> the string.
> There should be no more than 7 colons.
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