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Debian Security Advisory DSA-4488-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
July 25, 2019                         https://www.debian.org/security/faq
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Package        : exim4
CVE ID         : CVE-2019-13917

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.

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.

For the detailed security status of exim4 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/exim4

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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