==========================================================================
Ubuntu Security Notice USN-6154-1
June 12, 2023

vim vulnerabilities

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

• Ubuntu 23.04
• 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 Vim.

Software Description:

• vim: Vi IMproved - enhanced vi editor

Details:

It was discovered that Vim was using uninitialized memory when fuzzy
matching, which could lead to invalid memory access. An attacker could
possibly use this issue to cause a denial of service or execute arbitrary
code. This issue only affected Ubuntu 22.04 LTS, Ubuntu 22.10 and Ubuntu
23.04. (CVE-2023-2426)

It was discovered that Vim was not properly performing bounds checks when
processing register contents, which could lead to a NULL pointer
dereference. An attacker could possibly use this issue to cause a denial
of service or execute arbitrary code. (CVE-2023-2609)

It was discovered that Vim was not properly limiting the length of
substitution expression strings, which could lead to excessive memory
consumption. An attacker could possibly use this issue to cause a denial
of service. (CVE-2023-2610)

Update instructions:

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

Ubuntu 23.04:
vim 2:9.0.1000-4ubuntu3.1
vim-tiny 2:9.0.1000-4ubuntu3.1

Ubuntu 22.10:
vim 2:9.0.0242-1ubuntu1.4
vim-tiny 2:9.0.0242-1ubuntu1.4

Ubuntu 22.04 LTS:
vim 2:8.2.3995-1ubuntu2.8
vim-tiny 2:8.2.3995-1ubuntu2.8

Ubuntu 20.04 LTS:
vim 2:8.1.2269-1ubuntu5.15
vim-tiny 2:8.1.2269-1ubuntu5.15

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
vim 2:8.0.1453-1ubuntu1.13+esm1
vim-tiny 2:8.0.1453-1ubuntu1.13+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
vim 2:7.4.1689-3ubuntu1.5+esm18
vim-tiny 2:7.4.1689-3ubuntu1.5+esm18

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
vim 2:7.4.052-1ubuntu3.1+esm10
vim-tiny 2:7.4.052-1ubuntu3.1+esm10

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

References:
https://ubuntu.com/security/notices/USN-6154-1
CVE-2023-2426, CVE-2023-2609, CVE-2023-2610

Package Information:
https://launchpad.net/ubuntu/+source/vim/2:9.0.1000-4ubuntu3.1
https://launchpad.net/ubuntu/+source/vim/2:9.0.0242-1ubuntu1.4
https://launchpad.net/ubuntu/+source/vim/2:8.2.3995-1ubuntu2.8
https://launchpad.net/ubuntu/+source/vim/2:8.1.2269-1ubuntu5.15