Dear Exim users, while the recent CVEs addressed some issues that existed in Exim, there seems to be at least one issue that is related to a library we potentially use.
ZDI-23-1472 | ZDI-CAN-17578 | CVE-2023-42118 | Exim Bug 3032 - https://bugs.exim.org/show_bug.cgi?id=3032 - https://www.zerodayinitiative.com/advisories/ZDI-23-1472/ Unfortunately we do not have any further details. But the libspf2 repo on Github https://github.com/shevek/libspf2 contains at least one pull request that potentially addresses the issue: https://github.com/shevek/libspf2/pull/44 IMHO a CVE should be created for that issue. Or the CVE-2023-42118 should be re-assigned to the libspf2. So, if you do not want to disable the `spf` condition and `spf` lookups in your Exim configuration, you could try to use a patched version of the libspf2 library. Dear Debian users: currently it doesn't seem as Debian provides a patched version (because of the above mentioned uncertainty). To patch my own systems built a libspf2 package containing the patch. This package is *not officially supported*! Use it on your own risk. And I do not promise any maintenance, updates, functionality, compatibility. You're on your own using it. Please do not complain, if it breaks your systems. But I'm happy about feedback. - Git repo for `gbp`: https://gitea.schlittermann.de/DEB/libspf2 - Packages: https://apt.schlittermann.de/pool/main/libs/libspf2/ Hopefully this private hotfix will be outdated by official packages as soon as possible. Best regards from Dresden/Germany Viele Grüße aus Dresden Heiko Schlittermann -- SCHLITTERMANN.de ---------------------------- internet & unix support - Heiko Schlittermann, Dipl.-Ing. (TU) - {fon,fax}: +49.351.802998{1,3} - gnupg encrypted messages are welcome --------------- key ID: F69376CE -
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