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Ubuntu Security Notice USN-4582-1

Ubuntu Security Notice USN-4582-1
Posted Oct 14, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4582-1 - It was discovered that Vim incorrectly handled permissions on the .swp file. A local attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 16.04 LTS. It was discovered that Vim incorrectly handled restricted mode. A local attacker could possibly use this issue to bypass restricted mode and execute arbitrary commands. Note: This update only makes executing shell commands more difficult. Restricted mode should not be considered a complete security measure. Various other issues were also addressed.

tags | advisory, arbitrary, shell, local
systems | linux, ubuntu
advisories | CVE-2017-17087, CVE-2019-20807
MD5 | e6159e2f38d8be01d2ed2841a3b41473

Ubuntu Security Notice USN-4582-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4582-1
October 14, 2020

vim vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Vim.

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

Details:

It was discovered that Vim incorrectly handled permissions on the .swp
file. A local attacker could possibly use this issue to obtain sensitive
information. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-17087)

It was discovered that Vim incorrectly handled restricted mode. A local
attacker could possibly use this issue to bypass restricted mode and
execute arbitrary commands. Note: This update only makes executing shell
commands more difficult. Restricted mode should not be considered a
complete security measure. (CVE-2019-20807)

Update instructions:

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

Ubuntu 18.04 LTS:
vim 2:8.0.1453-1ubuntu1.4
vim-common 2:8.0.1453-1ubuntu1.4
vim-runtime 2:8.0.1453-1ubuntu1.4

Ubuntu 16.04 LTS:
vim 2:7.4.1689-3ubuntu1.5
vim-common 2:7.4.1689-3ubuntu1.5
vim-runtime 2:7.4.1689-3ubuntu1.5

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

References:
https://usn.ubuntu.com/4582-1
CVE-2017-17087, CVE-2019-20807

Package Information:
https://launchpad.net/ubuntu/+source/vim/2:8.0.1453-1ubuntu1.4
https://launchpad.net/ubuntu/+source/vim/2:7.4.1689-3ubuntu1.5
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