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[3.7] bpo-41004: Resolve hash collisions for IPv4Interface and IPv6Interfac… #21231

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Merged
merged 1 commit into from
Jun 30, 2020

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tapakund
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@tapakund tapakund commented Jun 30, 2020

…e (GH-21033)

The hash() methods of classes IPv4Interface and IPv6Interface had issue
of generating constant hash values of 32 and 128 respectively causing hash collisions.
The fix uses the hash() function to generate hash values for the objects
instead of XOR operation
(cherry picked from commit b30ee26)

Co-authored-by: Ravi Teja P rvteja92@gmail.com

Signed-off-by: Tapas Kundu tkundu@vmware.com

https://bugs.python.org/issue41004

@tapakund tapakund changed the title bpo-41004: Resolve hash collisions for IPv4Interface and IPv6Interfac… [3.7] bpo-41004: Resolve hash collisions for IPv4Interface and IPv6Interfac… Jun 30, 2020
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@corona10 corona10 left a comment

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Sorry we only accept security patch for 3.5-3.7.
I close this PR cc @ericvsmith

@corona10 corona10 closed this Jun 30, 2020
@corona10 corona10 reopened this Jun 30, 2020
@ericvsmith
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On the bpo issue, I've asked the release manager to weigh in.

@corona10 corona10 requested review from ericvsmith and ned-deily June 30, 2020 11:05
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Since this issue is reported as the CVE-2020-14422.
I am okay to merge this PR as the security issue.

But waiting for @ned-deily and @ericvsmith 's comment :)

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As I commented on the bpo issue, please add the CVE to the NEWS item.

…terface (pythonGH-21033)

The __hash__() methods of classes IPv4Interface and IPv6Interface had issue
of generating constant hash values of 32 and 128 respectively causing hash collisions.
The fix uses the hash() function to generate hash values for the objects
instead of XOR operation
(cherry picked from commit b30ee26)

Co-authored-by: Ravi Teja P <rvteja92@gmail.com>

Signed-off-by: Tapas Kundu <tkundu@vmware.com>
@ned-deily ned-deily merged commit b98e779 into python:3.7 Jun 30, 2020
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6 participants