Executive Summary

Summary
Title exim4 security update
Informations
Name DSA-4053 First vendor Publication 2017-11-30
Vendor Debian Last vendor Modification 2017-11-30
Severity (Vendor) N/A Revision 1

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
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Detail

Several vulnerabilities have been discovered in Exim, a mail transport agent. The Common Vulnerabilities and Exposures project identifies the following issues:

CVE-2017-16943

A use-after-free vulnerability was discovered in Exim's routines responsible for parsing mail headers. A remote attacker can take advantage of this flaw to cause Exim to crash, resulting in a denial of service, or potentially for remote code execution.

CVE-2017-16944

It was discovered that Exim does not properly handle BDAT data headers allowing a remote attacker to cause Exim to crash, resulting in a denial of service.

For the stable distribution (stretch), these problems have been fixed in version 4.89-2+deb9u2. Default installations disable advertising the ESMTP CHUNKING extension and are not affected by these issues.

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

Original Source

Url : http://www.debian.org/security/2017/dsa-4053

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-416 Use After Free

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 4
Os 1

Snort® IPS/IDS

Date Description
2019-09-26 Exim malformed BDAT code execution attempt
RuleID : 51301 - Revision : 1 - Type : SERVER-OTHER
2018-01-03 Exim malformed BDAT code execution attempt
RuleID : 45046 - Revision : 5 - Type : SERVER-OTHER

Nessus® Vulnerability Scanner

Date Description
2018-03-07 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201803-01.nasl - Type : ACT_GATHER_INFO
2018-01-15 Name : The remote Fedora host is missing a security update.
File : fedora_2017-0053bb9719.nasl - Type : ACT_GATHER_INFO
2017-12-26 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2017-932.nasl - Type : ACT_GATHER_INFO
2017-12-14 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2017-1342.nasl - Type : ACT_GATHER_INFO
2017-12-13 Name : The remote Fedora host is missing a security update.
File : fedora_2017-0032baa7d7.nasl - Type : ACT_GATHER_INFO
2017-12-01 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-4053.nasl - Type : ACT_GATHER_INFO
2017-12-01 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_75dd622cd5fd11e7b9fec13eb7bcbf4f.nasl - Type : ACT_GATHER_INFO
2017-11-30 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3499-1.nasl - Type : ACT_GATHER_INFO
2017-11-29 Name : The remote mail server is potentially affected by a remote code execution flaw.
File : exim_bdat_chunk_uaf.nasl - Type : ACT_GATHER_INFO
2017-11-28 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3493-1.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
Date Informations
2017-12-08 00:23:52
  • Multiple Updates
2017-12-02 13:23:48
  • Multiple Updates
2017-11-30 09:20:47
  • First insertion