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| author | Xiang Zhang <angwerzx@126.com> | 2017-05-09 03:38:32 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-05-09 03:38:32 (GMT) |
| commit | 9da408d15bdef624a5632182cb4edf98001fa82f (patch) | |
| tree | 55707952ef7b86c4c333122add2bc27101c27ef0 | |
| parent | fa5abac1e6cd74979557d5a6f960a55f40a10b0e (diff) | |
| download | cpython-9da408d15bdef624a5632182cb4edf98001fa82f.zip cpython-9da408d15bdef624a5632182cb4edf98001fa82f.tar.gz cpython-9da408d15bdef624a5632182cb4edf98001fa82f.tar.bz2 | |
bpo-29990: Fix range checking in GB18030 decoder (#1495)
When decoding a 4-byte GB18030 sequence, the first and third byte cannot exceed 0xFE.
| -rw-r--r-- | Lib/test/test_codecencodings_cn.py | 6 | ||||
| -rw-r--r-- | Misc/NEWS | 2 | ||||
| -rw-r--r-- | Modules/cjkcodecs/_codecs_cn.c | 4 |
3 files changed, 11 insertions, 1 deletions
diff --git a/Lib/test/test_codecencodings_cn.py b/Lib/test/test_codecencodings_cn.py index 3bdf7d0..c8a410c 100644 --- a/Lib/test/test_codecencodings_cn.py +++ b/Lib/test/test_codecencodings_cn.py @@ -48,6 +48,12 @@ class Test_GB18030(multibytecodec_support.TestBase, unittest.TestCase): (b"abc\x84\x32\x80\x80def", "replace", 'abc\ufffd2\ufffd\ufffddef'), (b"abc\x81\x30\x81\x30def", "strict", 'abc\x80def'), (b"abc\x86\x30\x81\x30def", "replace", 'abc\ufffd0\ufffd0def'), + # issue29990 + (b"\xff\x30\x81\x30", "strict", None), + (b"\x81\x30\xff\x30", "strict", None), + (b"abc\x81\x39\xff\x39\xc1\xc4", "replace", "abc\ufffd\x39\ufffd\x39\u804a"), + (b"abc\xab\x36\xff\x30def", "replace", 'abc\ufffd\x36\ufffd\x30def'), + (b"abc\xbf\x38\xff\x32\xc1\xc4", "ignore", "abc\x38\x32\u804a"), ) has_iso10646 = True @@ -317,6 +317,8 @@ Extension Modules Library ------- +- bpo-29990: Fix range checking in GB18030 decoder. Original patch by Ma Lin. + - bpo-29979: rewrite cgi.parse_multipart, reusing the FieldStorage class and making its results consistent with those of FieldStorage for multipart/form-data requests. Patch by Pierre Quentel. diff --git a/Modules/cjkcodecs/_codecs_cn.c b/Modules/cjkcodecs/_codecs_cn.c index 1a070f2..bda175c 100644 --- a/Modules/cjkcodecs/_codecs_cn.c +++ b/Modules/cjkcodecs/_codecs_cn.c @@ -279,7 +279,9 @@ DECODER(gb18030) REQUIRE_INBUF(4); c3 = INBYTE3; c4 = INBYTE4; - if (c < 0x81 || c3 < 0x81 || c4 < 0x30 || c4 > 0x39) + if (c < 0x81 || c > 0xFE || + c3 < 0x81 || c3 > 0xFE || + c4 < 0x30 || c4 > 0x39) return 1; c -= 0x81; c2 -= 0x30; c3 -= 0x81; c4 -= 0x30; |