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https://bugs.exim.org/show_bug.cgi?id=3081

Bug ID: 3081
Summary: Segfault if errors_to is used with a fixed address
Product: Exim
Version: N/A
Hardware: x86
OS: Linux
Status: NEW
Severity: bug
Priority: medium
Component: Address Rewriting
Assignee: unallocated@exim.org
Reporter: pjb1008@cam.ac.uk
CC: exim-dev@lists.exim.org

Created attachment 1475
--> https://bugs.exim.org/attachment.cgi?id=1475&action=edit
Extract local part and domain without modifying original string

Hi,

If errors_to is used with a fixed address, and mprotect is used to stop the
config being overwritten, then the address parsing code in rewrite_one() will
segfault.

This is because it temporarily replaces @ with NUL to extract the local part of
the address, but this is not possible if the config is protected.

Peter

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