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Debian Security Advisory DSA 4488-1 (exim4 - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'exim4' package(s) announced via the DSA-4488-1 advisory.
Insight
Insight
Jeremy Harris discovered that Exim, a mail transport agent, does not properly handle the ${sort } expansion. This flaw can be exploited by a remote attacker to execute programs with root privileges in non-default (and unusual) configurations where ${sort } expansion is used for items that can be controlled by an attacker.
Affected Software
Affected Software
'exim4' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
For the oldstable distribution (stretch), this problem has been fixed in version 4.89-2+deb9u5. For the stable distribution (buster), this problem has been fixed in version 4.92-8+deb10u1. We recommend that you upgrade your exim4 packages.