=========================================================================
Ubuntu Security Notice USN-6420-1
October 09, 2023

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

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

Summary:

Several security issues were fixed in Vim.

Software Description:
- vim: Vi IMproved - enhanced vi editor

Details:

It was discovered that Vim incorrectly handled memory when opening certain
files. If an attacker could trick a user into opening a specially crafted
file, it could cause Vim to crash, or possibly execute arbitrary code. This
issue only affected Ubuntu 22.04 LTS. (CVE-2022-3235, CVE-2022-3278,
CVE-2022-3297, CVE-2022-3491)

It was discovered that Vim incorrectly handled memory when opening certain
files. If an attacker could trick a user into opening a specially crafted
file, it could cause Vim to crash, or possibly execute arbitrary code. This
issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04
LTS. (CVE-2022-3352, CVE-2022-4292)

It was discovered that Vim incorrectly handled memory when replacing in
virtualedit mode. An attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04
LTS, and Ubuntu 22.04 LTS. (CVE-2022-3234)

It was discovered that Vim incorrectly handled memory when autocmd changes
mark. An attacker could possibly use this issue to cause a denial of
service. (CVE-2022-3256)

It was discovered that Vim did not properly perform checks on array index
with negative width window. An attacker could possibly use this issue to
cause a denial of service, or execute arbitrary code. (CVE-2022-3324)

It was discovered that Vim did not properly perform checks on a put command
column with a visual block. An attacker could possibly use this issue to
cause a denial of service. This issue only affected Ubuntu 20.04 LTS, and
Ubuntu 22.04 LTS. (CVE-2022-3520)

It was discovered that Vim incorrectly handled memory when using autocommand
to open a window. An attacker could possibly use this issue to cause a
denial of service. (CVE-2022-3591)

It was discovered that Vim incorrectly handled memory when updating buffer
of the component autocmd handler. An attacker could possibly use this issue
to cause a denial of service. This issue only affected Ubuntu 20.04 LTS,
and Ubuntu 22.04 LTS. (CVE-2022-3705)

It was discovered that Vim incorrectly handled floating point comparison
with incorrect operator. An attacker could possibly use this issue to cause
a denial of service. This issue only affected Ubuntu 20.04 LTS. and Ubuntu
22.04 LTS. (CVE-2022-4293)

Update instructions:

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

Ubuntu 22.04 LTS:
  vim                             2:8.2.3995-1ubuntu2.12
  vim-athena                      2:8.2.3995-1ubuntu2.12
  vim-gtk                         2:8.2.3995-1ubuntu2.12
  vim-gtk3                        2:8.2.3995-1ubuntu2.12
  vim-nox                         2:8.2.3995-1ubuntu2.12
  vim-tiny                        2:8.2.3995-1ubuntu2.12
  xxd                             2:8.2.3995-1ubuntu2.12

Ubuntu 20.04 LTS:
  vim                             2:8.1.2269-1ubuntu5.18
  vim-athena                      2:8.1.2269-1ubuntu5.18
  vim-gtk                         2:8.1.2269-1ubuntu5.18
  vim-gtk3                        2:8.1.2269-1ubuntu5.18
  vim-nox                         2:8.1.2269-1ubuntu5.18
  vim-tiny                        2:8.1.2269-1ubuntu5.18
  xxd                             2:8.1.2269-1ubuntu5.18

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  vim                             2:8.0.1453-1ubuntu1.13+esm5
  vim-athena                      2:8.0.1453-1ubuntu1.13+esm5
  vim-gtk                         2:8.0.1453-1ubuntu1.13+esm5
  vim-gtk3                        2:8.0.1453-1ubuntu1.13+esm5
  vim-nox                         2:8.0.1453-1ubuntu1.13+esm5
  vim-tiny                        2:8.0.1453-1ubuntu1.13+esm5
  xxd                             2:8.0.1453-1ubuntu1.13+esm5

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
  vim                             2:7.4.052-1ubuntu3.1+esm13
  vim-athena                      2:7.4.052-1ubuntu3.1+esm13
  vim-gnome                       2:7.4.052-1ubuntu3.1+esm13
  vim-gtk                         2:7.4.052-1ubuntu3.1+esm13
  vim-nox                         2:7.4.052-1ubuntu3.1+esm13
  vim-tiny                        2:7.4.052-1ubuntu3.1+esm13

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

References:
  https://ubuntu.com/security/notices/USN-6420-1
  CVE-2022-3234, CVE-2022-3235, CVE-2022-3256, CVE-2022-3278,
  CVE-2022-3297, CVE-2022-3324, CVE-2022-3352, CVE-2022-3491,
  CVE-2022-3520, CVE-2022-3591, CVE-2022-3705, CVE-2022-4292,
  CVE-2022-4293

Package Information:
  https://launchpad.net/ubuntu/+source/vim/2:8.2.3995-1ubuntu2.12
  https://launchpad.net/ubuntu/+source/vim/2:8.1.2269-1ubuntu5.18