Alerts This Week
Warning Icon 1 764
Alerts This Week
Warning Icon 1 764

Ubuntu 20.04: USN-6881-1 Critical Exim Response Injection Threat

ubuntu
Calendar Grey July 10, 2024
Dist Ubuntu Esm H88
Exim has implemented a security patch addressing a response injection vulnerability that impacts various versions of Ubuntu. Discover additional details here.
Exim could be made to allow response injection if it received a specially crafted response.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: Exim could be made to allow response injection if it received a specially crafted response. Software Description: - exim4: Exim is a mail transport agent Details: It was discovered that Exim did not enforce STARTTLS sync point on client side. An attacker could possibly use this issue to perform response injection during MTA SMTP sending.

Topics%20covered

Topics Covered

security advisory security update critical exim ubuntu mail transport agent response injection

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS   exim4                           4.93-13ubuntu1.11   exim4-base                      4.93-13ubuntu1.11   eximon4  4.93-13ubuntu1.11 Ubuntu 18.04 LTS   exim4                           4.90.1-1ubuntu1.10+esm4                                   Available with Ubuntu Pro   exim4-base                      4.90.1-1ubuntu1.10+esm4                                   Available with Ubuntu Pro   eximon4                         4.90.1-1ubuntu1.10+esm4                                   Available with Ubuntu Pro Ubuntu 16.04 LTS   exim4                           4.86.2-2ubuntu2.6+esm7                                   Available with Ubuntu Pro   exim4-base                      4.86.2-2ubuntu2.6+esm7                                   Available with Ubuntu Pro   eximon4                         4.86.2-2ubuntu2.6+esm7                                   Available with Ubuntu Pro Ubuntu 14.04 LTS   exim4                           4.82-3ubuntu2.4+esm8                                   Available with Ubuntu Pro   exim4-base                      4.82-3ubuntu2.4+esm8                                   Available with Ubuntu Pro   eximon4                         4.82-3ubuntu2.4+esm8                                   Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-6881-1

  CVE-2021-38371

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6881-1

Topics%20covered

Topics Covered

security advisory security update critical exim ubuntu mail transport agent response injection

Package Information

https://launchpad.net/ubuntu/+source/exim4/4.93-13ubuntu1.11

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here