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List:       spamassassin-devel
Subject:    [Bug 7307] New: Base64 decoded headers have invisible characters sometimes injected at line breaks
From:       bugzilla-daemon () bugzilla ! spamassassin ! org
Date:       2016-03-25 21:49:45
Message-ID: bug-7307-26 () https ! bz ! apache ! org/SpamAssassin/
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https://bz.apache.org/SpamAssassin/show_bug.cgi?id=7307

            Bug ID: 7307
           Summary: Base64 decoded headers have invisible characters
                    sometimes injected at line breaks
           Product: Spamassassin
           Version: SVN Trunk (Latest Devel Version)
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Rules
          Assignee: dev@spamassassin.apache.org
          Reporter: jidanni@jidanni.org

Can you believe

Subject: =?UTF-8?B?44CQ6YeN6KaB6KiK5oGv44CR5Y+w6Zu7MTA15bm0?=
 =?UTF-8?B?M+aciOmbu+iyu++8jOWnlOiol+mHkeiejeapn+ani+aJow==?=
 =?UTF-8?B?57mz5oiQ5Yqf6Zu75a2Q57mz6LK75oaR6K2JKOmbu+iZnw==?=
 =?UTF-8?B?MDc0ODc2MTY3MzAp?=

decodes to

Mar 26 05:25:46.233 [9866] dbg: message: _decode_header subject:
【重要訊息】台電105年3月電費，委託金融機構扣_繳成功電子繳費憑證(電號_07487616730)


that "_" spuriously injected, causes

header J_TAIPOWER_RCT Subject=~/委託金融機構扣繳成功電子繳費憑證/
not to match, instead needing ".." to match it too
header J_TAIPOWER_RCT Subject=~/委託金融機構扣..繳成功電子繳費憑證/

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