[exim] Older versions of Exim (CVE-2016-1531)

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Autor: Heiko Schlittermann
Datum:  
To: exim-users
Betreff: [exim] Older versions of Exim (CVE-2016-1531)
Hi,

I'd like to share an (obvious?) observation …

As I used to install Exim from the git checkout via make && make install:
The build and installation process creates copies of the old exim
binaries, with full suid-root permissions.

As long as you do not use the new configuration options keep_environment
or add_environment, these old versions will start happily and having a
fixed version installed additionally doesn't help a lot.

So, hopefully you put the keep_environment or add_environment option
into your configuration (at least to avoid the warning at startup)
already. Older versions of Exim don't understand these options and just
die.

Maybe I'm the only stupid one, maybe someone else got bitten too :)

    Best regards from Dresden/Germany
    Viele Grüße aus Dresden
    Heiko Schlittermann
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