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Ubuntu: 4110-1 Critical: Dovecot Denial Of Service and Code Execution

ubuntu
Calendar Grey August 28, 2019
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-4110-1 highlights a vulnerability in Dovecot that can be exploited to execute arbitrary code or cause a system crash when processing specially crafted input.
Dovecot could be made to crash or execute arbitrary code if it received a specially crafted data.

Summary

Dovecot could be made to crash or execute arbitrary code if it

received a specially crafted data.

Software Description:

- dovecot: IMAP and POP3 email server

Details:

Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly

handled certain data. An attacker could possibly use this issue

to cause a denial of service or execute arbitrary code.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu arbitrary code execution risk Dovecot

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 19.04:
  dovecot-core                    1:2.3.4.1-1ubuntu2.3

Ubuntu 18.04 LTS:
  dovecot-core                    1:2.2.33.2-1ubuntu4.4

Ubuntu 16.04 LTS:
  dovecot-core                    1:2.2.22-1ubuntu2.11

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4110-1

CVE-2019-11500

Severity
critical
Lowest
Low
Medium
High
Critical

August 28, 2019

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu arbitrary code execution risk Dovecot

Package Information

https://launchpad.net/ubuntu/+source/dovecot/1:2.3.4.1-1ubuntu2.3
https://launchpad.net/ubuntu/+source/dovecot/1:2.2.33.2-1ubuntu4.4
https://launchpad.net/ubuntu/+source/dovecot/1:2.2.22-1ubuntu2.11

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