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From: "Nikita V. Youshchenko" <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: libc6: iconv seems not to handle utf-8 as specified in rfc2279
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Date: Sat, 11 Oct 2003 18:21:46 +0400
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Package: libc6
Version: 2.3.2-8
Severity: normal
UTF-8 encoding is specified in RFC2279 as follows:
UCS-4 range (hex.) UTF-8 octet sequence (binary)
0000 0000-0000 007F 0xxxxxxx
0000 0080-0000 07FF 110xxxxx 10xxxxxx
0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
0001 0000-001F FFFF 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
0020 0000-03FF FFFF 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
0400 0000-7FFF FFFF 1111110x 10xxxxxx ... 10xxxxxx
This means that ascii characters (hex 20 - 7F range) have multiple
representations. In fact, is a well-known issue in security analysis.
E.g. '.' character has the following representations:
2E
C0 AE
E0 80 AE
F0 80 80 AE
F8 80 80 80 AE
FC 80 80 80 80 AE.
However, iconv can handle only the first of these representations:
[EMAIL PROTECTED]:~> printf '\x2E\n' | iconv -f utf-8 -t us-ascii
