=========================================================================Ubuntu Security Notice USN-6146-1
June 08, 2023

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

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in Netatalk.

Software Description:
- netatalk: Apple Filing Protocol service

Details:

It was discovered that Netatalk did not properly validate the length of
user-supplied data in the DSI structures. A remote attacker could possibly
use this issue to execute arbitrary code with the privileges of the user
invoking the programs. This issue only affected Ubuntu 20.04 LTS and Ubuntu
22.04 LTS. (CVE-2021-31439)

It was discovered that Netatalk did not properly validate the length of
user-supplied data in the ad_addcomment function. A remote attacker could
possibly use this issue to execute arbitrary code with root privileges.
This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2022-0194)

It was discovered that Netatalk did not properly handle errors when parsing
AppleDouble entries. A remote attacker could possibly use this issue to
execute arbitrary code with root privileges. This issue only affected
Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and
Ubuntu 22.04 LTS. (CVE-2022-23121)

It was discovered that Netatalk did not properly validate the length of
user-supplied data in the setfilparams function. A remote attacker could
possibly use this issue to execute arbitrary code with root privileges.
This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2022-23122)

It was discovered that Netatalk did not properly validate the length of
user-supplied data in the getdirparams function. A remote attacker could
possibly use this issue to execute arbitrary code with root privileges.
This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04
LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2022-23123)

It was discovered that Netatalk did not properly validate the length of
user-supplied data in the get_finderinfo function. A remote attacker could
possibly use this issue to execute arbitrary code with root privileges.
This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2022-23124)

It was discovered that Netatalk did not properly validate the length of
user-supplied data in the copyapplfile function. A remote attacker could
possibly use this issue to execute arbitrary code with root privileges.
This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04
LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2022-23125)

It was discovered that Netatalk did not properly validate the length of
user-supplied data in the dsi_writeinit function. A remote attacker could
possibly use this issue to execute arbitrary code with root privileges.
This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu
22.10. (CVE-2022-43634)

It was discovered that Netatalk did not properly manage memory under
certain circumstances. If a user were tricked into opening a specially
crafted .appl file, a remote attacker could possibly use this issue to
execute arbitrary code. (CVE-2022-45188)

Update instructions:

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

Ubuntu 22.10:
  netatalk                        3.1.13~ds-2ubuntu0.22.10.1

Ubuntu 22.04 LTS:
  netatalk                        3.1.12~ds-9ubuntu0.22.04.1

Ubuntu 20.04 LTS:
  netatalk                        3.1.12~ds-4ubuntu0.20.04.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  netatalk                        2.2.6-1ubuntu0.18.04.2+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  netatalk                        2.2.5-1ubuntu0.2+esm1

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
  netatalk                        2.2.2-1ubuntu2.2+esm1

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

References:
  https://ubuntu.com/security/notices/USN-6146-1
  CVE-2021-31439, CVE-2022-0194, CVE-2022-23121, CVE-2022-23122,
  CVE-2022-23123, CVE-2022-23124, CVE-2022-23125, CVE-2022-43634,
  CVE-2022-45188

Package Information:
  https://launchpad.net/ubuntu/+source/netatalk/3.1.13~ds-2ubuntu0.22.10.1
  https://launchpad.net/ubuntu/+source/netatalk/3.1.12~ds-9ubuntu0.22.04.1
  https://launchpad.net/ubuntu/+source/netatalk/3.1.12~ds-4ubuntu0.20.04.1