Message 342919 - Python tracker

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Author	vstinner
Recipients	christian.heimes, ncoghlan, vstinner
Date	2019-05-20.15:32:22
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1558366342.35.0.424253452367.issue26122@roundup.psfhosted.org>
In-reply-to

Content
> Is there a way to fix the issue in 3.7 and earlier? We might consider it a security issue. Hum, Python 3.7 is fixed as well. At least, in the 3.7 dev branch. Fixed seed: vstinner@apu$ PYTHONHASHSEED=42 ./python -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 ./python -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 ./python -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 ./python -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} Random seed: vstinner@apu$ PYTHONHASHSEED=42 ./python -I -c 'print(set("abcdefgh"))' {'b', 'e', 'd', 'f', 'g', 'c', 'a', 'h'} vstinner@apu$ PYTHONHASHSEED=42 ./python -I -c 'print(set("abcdefgh"))' {'d', 'g', 'e', 'b', 'h', 'f', 'a', 'c'} vstinner@apu$ PYTHONHASHSEED=42 ./python -I -c 'print(set("abcdefgh"))' {'e', 'b', 'g', 'c', 'a', 'h', 'f', 'd'} vstinner@apu$ PYTHONHASHSEED=42 ./python -I -c 'print(set("abcdefgh"))' {'c', 'd', 'a', 'g', 'f', 'e', 'h', 'b'} -- Python 3.6 has the bug: vstinner@apu$ PYTHONHASHSEED=42 python3.6 -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 python3.6 -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 python3.6 -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 python3.6 -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 python3.6 -I -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 python3.6 -I -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 python3.6 -I -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'} vstinner@apu$ PYTHONHASHSEED=42 python3.6 -I -c 'print(set("abcdefgh"))' {'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}

> Is there a way to fix the issue in 3.7 and earlier? We might consider it a security issue.

Hum, Python 3.7 is fixed as well. At least, in the 3.7 dev branch.

Fixed seed:

vstinner@apu$ PYTHONHASHSEED=42 ./python -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 ./python -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 ./python -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 ./python -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}

Random seed:

vstinner@apu$ PYTHONHASHSEED=42 ./python -I -c 'print(set("abcdefgh"))'
{'b', 'e', 'd', 'f', 'g', 'c', 'a', 'h'}
vstinner@apu$ PYTHONHASHSEED=42 ./python -I -c 'print(set("abcdefgh"))'
{'d', 'g', 'e', 'b', 'h', 'f', 'a', 'c'}
vstinner@apu$ PYTHONHASHSEED=42 ./python -I -c 'print(set("abcdefgh"))'
{'e', 'b', 'g', 'c', 'a', 'h', 'f', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 ./python -I -c 'print(set("abcdefgh"))'
{'c', 'd', 'a', 'g', 'f', 'e', 'h', 'b'}

--

Python 3.6 has the bug:

vstinner@apu$ PYTHONHASHSEED=42 python3.6 -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 python3.6 -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 python3.6 -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 python3.6 -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}

vstinner@apu$ PYTHONHASHSEED=42 python3.6 -I -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 python3.6 -I -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 python3.6 -I -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}
vstinner@apu$ PYTHONHASHSEED=42 python3.6 -I -c 'print(set("abcdefgh"))'
{'g', 'e', 'a', 'b', 'c', 'f', 'h', 'd'}

History
Date	User	Action	Args
2019-05-20 15:32:22	vstinner	set	recipients: + vstinner, ncoghlan, christian.heimes
2019-05-20 15:32:22	vstinner	set	messageid: <1558366342.35.0.424253452367.issue26122@roundup.psfhosted.org>
2019-05-20 15:32:22	vstinner	link	issue26122 messages
2019-05-20 15:32:22	vstinner	create