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Test ID:1.3.6.1.4.1.25623.1.0.704110
Category:Debian Local Security Checks
Title:Debian Security Advisory DSA 4110-1 (exim4 - security update)
Summary:Meh Chang discovered a buffer overflow flaw in a utility function used;in the SMTP listener of Exim, a mail transport agent. A remote attacker;can take advantage of this flaw to cause a denial of service, or;potentially the execution of arbitrary code via a specially crafted;message.
Description:Summary:
Meh Chang discovered a buffer overflow flaw in a utility function used
in the SMTP listener of Exim, a mail transport agent. A remote attacker
can take advantage of this flaw to cause a denial of service, or
potentially the execution of arbitrary code via a specially crafted
message.

Affected Software/OS:
exim4 on Debian Linux

Solution:
For the oldstable distribution (jessie), this problem has been fixed
in version 4.84.2-2+deb8u5.

For the stable distribution (stretch), this problem has been fixed in
version 4.89-2+deb9u3.

We recommend that you upgrade your exim4 packages.

CVSS Score:
7.5

CVSS Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2018-6789
BugTraq ID: 103049
http://www.securityfocus.com/bid/103049
Debian Security Information: DSA-4110 (Google Search)
https://www.debian.org/security/2018/dsa-4110
https://www.exploit-db.com/exploits/44571/
https://www.exploit-db.com/exploits/45671/
http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html
https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/
https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html
http://www.openwall.com/lists/oss-security/2018/02/07/2
http://www.securitytracker.com/id/1040461
https://usn.ubuntu.com/3565-1/
CopyrightCopyright (C) 2018 Greenbone Networks GmbH

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