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Bug 554894 - net-mail/courier-imap's mkdhparams script defaults to an insecure 768-bits.
Summary: net-mail/courier-imap's mkdhparams script defaults to an insecure 768-bits.
Status: RESOLVED DUPLICATE of bug 552266
Alias: None
Product: Gentoo Security
Classification: Unclassified
Component: Default Configs (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
URL:
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Keywords:
Depends on:
Blocks:
 
Reported: 2015-07-14 13:29 UTC by Philippe Chaintreuil
Modified: 2015-07-14 13:35 UTC (History)
0 users

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Description Philippe Chaintreuil 2015-07-14 13:29:09 UTC 
courier-imap supplies a script to generate dhparams, but the script generates an meager 768-bits.  As learned from the LogJam attacks, 768 is too low.

We should modify the script so it defaults to 2048 bits (arguably we could get away with 1024).



Reproducible: Always




Upstream bug: https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1327088.html

LogJam attack info: https://weakdh.org/

Of note: Mozilla Thunderbird will no longer connect to a server with such weak dhparams.
Comment 1 Alex Legler (RETIRED) archtester gentoo-dev Security 2015-07-14 13:35:00 UTC 

*** This bug has been marked as a duplicate of bug 552266 ***