Mailing List Archive

https://bugs.exim.org/show_bug.cgi?id=2696

Bug ID: 2696
Summary: Buffer overflow in iplsearch
Product: Exim
Version: 4.92
Hardware: x86-64
OS: Linux
Status: NEW
Severity: security
Priority: medium
Component: ACLs
Assignee: jgh146exb@wizmail.org
Reporter: atodyl@gmail.com
CC: exim-dev@exim.org

I have a large number of entries in /var/cache/cluster_ips - around 2000 lines
including both IPv4 and IPv6 entries. Example entries in
/var/cache/cluster_ips:
===
192.168.100.1:true
"fe80::b6b5:2fff:fe52:cfb4":true
===

While checking the mainlog I see strange values for `PRX=`, showing random
parts of the list of IP addresses from /var/cache/cluster_ips. The IPs show
split by semicolons.

I use the list in this condition:
===
warn
condition = ${if exists {/var/cache/cluster_ips}}
condition = ${if
eq{${lookup{$sender_host_address}iplsearch{/var/cache/cluster_ips}}}{true}}
set acl_c_in_cluster = true
===

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