Advisory Published

USN-6411-1: Exim vulnerabilities

First published: Wed Oct 04 2023(Updated: )

It was discovered that Exim incorrectly handled certain challenge requests. A remote attacker could possibly use this issue to perform out-of-bounds reads, resulting in information leakage. (CVE-2023-42114) It was discovered that Exim incorrectly handled validation of user-supplied data. A remote attacker could possibly use this issue to perform out-of-bounds writes, resulting in arbitrary code execution. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2023-42115) It was discovered that Exim incorrectly handled certain challenge requests. A remote attacker could possibly use this issue to perform out-of-bounds writes, resulting in arbitrary code execution. (CVE-2023-42116)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/exim4<4.96-14ubuntu1.2
4.96-14ubuntu1.2
=23.04
All of
ubuntu/exim4-base<4.96-14ubuntu1.2
4.96-14ubuntu1.2
=23.04
All of
ubuntu/exim4-daemon-heavy<4.96-14ubuntu1.2
4.96-14ubuntu1.2
=23.04
All of
ubuntu/exim4-daemon-light<4.96-14ubuntu1.2
4.96-14ubuntu1.2
=23.04
All of
ubuntu/eximon4<4.96-14ubuntu1.2
4.96-14ubuntu1.2
=23.04
All of
ubuntu/exim4<4.95-4ubuntu2.3
4.95-4ubuntu2.3
=22.04
All of
ubuntu/exim4-base<4.95-4ubuntu2.3
4.95-4ubuntu2.3
=22.04
All of
ubuntu/exim4-daemon-heavy<4.95-4ubuntu2.3
4.95-4ubuntu2.3
=22.04
All of
ubuntu/exim4-daemon-light<4.95-4ubuntu2.3
4.95-4ubuntu2.3
=22.04
All of
ubuntu/eximon4<4.95-4ubuntu2.3
4.95-4ubuntu2.3
=22.04
All of
ubuntu/exim4<4.93-13ubuntu1.8
4.93-13ubuntu1.8
=20.04
All of
ubuntu/exim4-base<4.93-13ubuntu1.8
4.93-13ubuntu1.8
=20.04
All of
ubuntu/exim4-daemon-heavy<4.93-13ubuntu1.8
4.93-13ubuntu1.8
=20.04
All of
ubuntu/exim4-daemon-light<4.93-13ubuntu1.8
4.93-13ubuntu1.8
=20.04
All of
ubuntu/eximon4<4.93-13ubuntu1.8
4.93-13ubuntu1.8
=20.04
All of
ubuntu/exim4<4.90.1-1ubuntu1.10+esm1
4.90.1-1ubuntu1.10+esm1
=18.04
All of
ubuntu/exim4-base<4.90.1-1ubuntu1.10+esm1
4.90.1-1ubuntu1.10+esm1
=18.04
All of
ubuntu/exim4-daemon-heavy<4.90.1-1ubuntu1.10+esm1
4.90.1-1ubuntu1.10+esm1
=18.04
All of
ubuntu/exim4-daemon-light<4.90.1-1ubuntu1.10+esm1
4.90.1-1ubuntu1.10+esm1
=18.04
All of
ubuntu/eximon4<4.90.1-1ubuntu1.10+esm1
4.90.1-1ubuntu1.10+esm1
=18.04
All of
ubuntu/exim4<4.86.2-2ubuntu2.6+esm4
4.86.2-2ubuntu2.6+esm4
=16.04
All of
ubuntu/exim4-base<4.86.2-2ubuntu2.6+esm4
4.86.2-2ubuntu2.6+esm4
=16.04
All of
ubuntu/exim4-daemon-heavy<4.86.2-2ubuntu2.6+esm4
4.86.2-2ubuntu2.6+esm4
=16.04
All of
ubuntu/exim4-daemon-light<4.86.2-2ubuntu2.6+esm4
4.86.2-2ubuntu2.6+esm4
=16.04
All of
ubuntu/eximon4<4.86.2-2ubuntu2.6+esm4
4.86.2-2ubuntu2.6+esm4
=16.04
All of
ubuntu/exim4<4.82-3ubuntu2.4+esm6
4.82-3ubuntu2.4+esm6
=14.04
All of
ubuntu/exim4-base<4.82-3ubuntu2.4+esm6
4.82-3ubuntu2.4+esm6
=14.04
All of
ubuntu/exim4-daemon-heavy<4.82-3ubuntu2.4+esm6
4.82-3ubuntu2.4+esm6
=14.04
All of
ubuntu/exim4-daemon-light<4.82-3ubuntu2.4+esm6
4.82-3ubuntu2.4+esm6
=14.04
All of
ubuntu/eximon4<4.82-3ubuntu2.4+esm6
4.82-3ubuntu2.4+esm6
=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Exim vulnerability?

    The vulnerability ID for this Exim vulnerability is CVE-2023-42114.

  • What is the severity of CVE-2023-42114?

    The severity of CVE-2023-42114 is not specified in the provided information. Please refer to the references for more details.

  • How does CVE-2023-42114 affect Exim4?

    CVE-2023-42114 affects Exim4 versions 4.96-14ubuntu1.2 and earlier.

  • What is the remedy for CVE-2023-42114 in Ubuntu 23.04?

    The remedy for CVE-2023-42114 in Ubuntu 23.04 is to update the Exim4 packages to version 4.96-14ubuntu1.2 or later.

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