A vulnerability in Exim may allow local users to gain root privileges.
|Package||mail-mta/exim on all architectures|
|Affected versions||< 4.89-r1|
|Unaffected versions||>= 4.89-r1|
Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
Exim supports the use of multiple “-p” command line arguments causing a memory leak. This could lead to a stack-clash in user-space and as result the attacker can, “clash” or “smash” the stack or another memory region, or “jump” over the stack guard-page.
A local attacker could obtain root privileges.
There is no known workaround at this time.
All Exim users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=mail-mta/exim-4.89-r1"
September 24, 2017
September 24, 2017: 1