A ConnMan security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 23.04.

[USN-6236-1] ConnMan vulnerabilities

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Ubuntu Security Notice USN-6236-1
July 19, 2023

connman vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in ConnMan.

Software Description:
- connman: Intel Connection Manager daemon

Details:

It was discovered that ConnMan could be made to write out of bounds. A
remote attacker could possibly use this issue to cause ConnMan to crash,
resulting in a denial of service, or possibly execute arbitrary code. This
issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
(CVE-2021-26675, CVE-2021-33833)

It was discovered that ConnMan could be made to leak sensitive information
via the gdhcp component. A remote attacker could possibly use this issue
to obtain information for further exploitation. This issue only affected
Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-26676)

It was discovered that ConnMan could be made to read out of bounds. A
remote attacker could possibly use this issue to case ConnMan to crash,
resulting in a denial of service. This issue only affected Ubuntu 16.04
LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS.
(CVE-2022-23096, CVE-2022-23097)

It was discovered that ConnMan could be made to run into an infinite loop.
A remote attacker could possibly use this issue to cause ConnMan to
consume resources and to stop operating, resulting in a denial of service.
This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04
LTS, and Ubuntu 22.04 LTS. (CVE-2022-23098)

It was discovered that ConnMan could be made to write out of bounds via
the gweb component. A remote attacker could possibly use this issue to
cause ConnMan to crash, resulting in a denial of service, or possibly
execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2022-32292)

It was discovered that ConnMan did not properly manage memory under
certain circumstances. A remote attacker could possibly use this issue to
cause ConnMan to crash, resulting in a denial of service, or possibly
execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2022-32293)

It was discovered that ConnMan could be made to write out of bounds via
the gdhcp component. A remote attacker could possibly use this issue to
cause ConnMan to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2023-28488)

Update instructions:

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

Ubuntu 23.04:
  connman                         1.41-2ubuntu0.23.04.1

Ubuntu 22.04 LTS:
  connman                         1.36-2.3ubuntu0.1

Ubuntu 20.04 LTS:
  connman                         1.36-2ubuntu0.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  connman                         1.35-6ubuntu0.1~esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  connman                         1.21-1.2+deb8u1ubuntu0.1~esm1

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

References:
  https://ubuntu.com/security/notices/USN-6236-1
  CVE-2021-26675, CVE-2021-26676, CVE-2021-33833, CVE-2022-23096,
  CVE-2022-23097, CVE-2022-23098, CVE-2022-32292, CVE-2022-32293,
  CVE-2023-28488

Package Information:
https://launchpad.net/ubuntu/+source/connman/1.41-2ubuntu0.23.04.1
  https://launchpad.net/ubuntu/+source/connman/1.36-2.3ubuntu0.1
  https://launchpad.net/ubuntu/+source/connman/1.36-2ubuntu0.1