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https://issues.apache.org/jira/browse/JAMES-2240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tellier Benoit resolved JAMES-2240.
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Resolution: Fixed
https://github.com/linagora/james-project/pull/1156 solved the issue
> Use of MD5 for checksum to index email body
> -------------------------------------------
>
> Key: JAMES-2240
> URL: https://issues.apache.org/jira/browse/JAMES-2240
> Project: James Server
> Issue Type: Bug
> Components: James Core
> Affects Versions: master
> Reporter: Thibaut SAUTEREAU
>
> In the MBoxMailRepository class, the generateKeyValue() function uses MD5 to
> compute a key, which is supposed to be unique in order to then index every
> single email body.
> However, MD5 is vulnerable to lots of collisions and an attacker could manage
> to replace (understand "overwrite") an existing indexed email body by another
> one, leading to many potential abuses.
> A more cryptographically secure hash function such as SHA-256 or SHA-512
> should be used instead.
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