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Bug 889024 - mail-filter/opendkim: "Composition kills" vulnerabilities
Summary: mail-filter/opendkim: "Composition kills" vulnerabilities
Status: RESOLVED INVALID
Alias: None
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
URL: https://github.com/trusteddomainproje...
Whiteboard: ??
Keywords:
Depends on:
Blocks:
 
Reported: 2022-12-30 21:50 UTC by John Helmert III
Modified: 2022-12-31 03:45 UTC (History)
2 users (show)

See Also:
Package list:
Runtime testing required: ---

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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-12-30 21:50:01 UTC 
Unclear if there's anything actionable for us here, but
there's an upstream report at URL.
Comment 1 Michael Orlitzky gentoo-dev 2022-12-30 23:42:33 UTC 
The USENIX talk is mostly about tricking user interfaces.

When used for signing, I don't see any issues that could affect OpenDKIM. 

For verification, there was one attack where gmail could be tricked into making an incorrect DNS query by putting a NULL character in the selector name. Similar attacks could conceivably affect OpenDKIM, but the github issue does not mention any specifically.

FWIW OpenDKIM is under-maintained upstream, and I would recommend using something else (spamassassin, dkimpy) for verification. But there are no obvious problems with OpenDKIM here.
Comment 2 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-12-31 03:45:13 UTC 
Works for me. I've subscribed to the bug upstream and I'll reopen if anything actionable comes of it.