[USN-5093-1] Vim vulnerabilities

[Spyros Seimenis]

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Ubuntu Security Notice USN-5093-1
September 28, 2021

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

- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in Vim.

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

Details:

Brian Carpenter discovered that vim incorrectly handled memory
when opening certain files. If a user was tricked into opening
a specially crafted file, a remote attacker could crash the
application, leading to a denial of service, or possibly execute
arbitrary code with user privileges. This issue only affected
Ubuntu 20.04 LTS and Ubuntu 21.04. (CVE-2021-3770)

Brian Carpenter discovered that vim incorrectly handled memory
when opening certain files. If a user was tricked into opening
a specially crafted file, a remote attacker could crash the
application, leading to a denial of service, or possibly execute
arbitrary code with user privileges. (CVE-2021-3778)

Dhiraj Mishra discovered that vim incorrectly handled memory
when opening certain files. If a user was tricked into opening
a specially crafted file, a remote attacker could crash the
application, leading to a denial of service, or possibly execute
arbitrary code with user privileges. (CVE-2021-3796)

Update instructions:

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

Ubuntu 21.04:
  vim                             2:8.2.2434-1ubuntu1.1

Ubuntu 20.04 LTS:
  vim                             2:8.1.2269-1ubuntu5.3

Ubuntu 18.04 LTS:
  vim                             2:8.0.1453-1ubuntu1.6

Ubuntu 16.04 ESM:
  vim                             2:7.4.1689-3ubuntu1.5+esm2

Ubuntu 14.04 ESM:
  vim                             2:7.4.052-1ubuntu3.1+esm3

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

References:
  https://ubuntu.com/security/notices/USN-5093-1
  CVE-2021-3770, CVE-2021-3778, CVE-2021-3796

Package Information:
  https://launchpad.net/ubuntu/+source/vim/2:8.2.2434-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/vim/2:8.1.2269-1ubuntu5.3
  https://launchpad.net/ubuntu/+source/vim/2:8.0.1453-1ubuntu1.6
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