exim 4.96 & procmail
Latest update:
After Fedora updated Exim to 4.96, my local mail stopped working.
2022-09-19 22:36:10 1oaMYs-000FMv-0w ** alex@a520.lan R=procmail T=procmail: Tainted arg 2 for procmail transport command: 'alex'
2022-09-19 22:36:10 1oaMYs-000FMv-0w Frozen (delivery error message)
Turns out, the default Exim config in Fedora 36 is not fully synced to
the most recent Exim idiocy with 'tainted data'. In
# grep \"/usr/bin/procmail /etc/exim/exim.conf.rpmnew
command = "/usr/bin/procmail -d $local_part"
the value of $local_part is extracted directly from email, hence it
is under the control of an evil sender. In the Exim parlance, such a
variable is called tainted.
To fix the nuisance, modify the command in 'procmail' transport to:
command = "/usr/bin/procmail -d $local_part_data"
Tags: ойті
Authors: ag