关于在Ubuntu 20.04 LTS非ESM环境下安装libgsasl7_1.8.1-1ubuntu0.1~esm1包的技术咨询

Hi there, let's break down your problem and walk through practical solutions you can try:

First, let's clarify: The libgsasl7_1.8.1-1ubuntu0.1~esm1 package is exclusive to Ubuntu's Extended Security Maintenance (ESM) repository. It won't show up in the standard non-ESM package sources for Ubuntu 20.04 LTS, since ESM provides security updates for certain packages after the standard LTS support window wraps up for them.

Here are your options to get this security fix without fully committing to ESM long-term:

1. Manually download and install the DEB package #

This is the most direct way if you don't want to enable ESM at all:

• First, confirm your system's architecture (e.g., amd64, i386) by running:

  dpkg --print-architecture
  

• Locate the official DEB file for your architecture from Ubuntu's package archive (make sure you're grabbing the exact version 1.8.1-1ubuntu0.1~esm1).
• Download the package, then install it with:

  sudo dpkg -i libgsasl7_1.8.1-1ubuntu0.1~esm1_<your-architecture>.deb
  

• If you hit dependency errors, run this to fix them:

  sudo apt-get install -f
  

Important notes for this method:

• Always verify you're downloading from Ubuntu's official sources to avoid malicious packages. You can check the package's integrity with:

  dpkg -V libgsasl7
  

• After manual installation, this package won't receive automatic updates from standard sources. You'll need to manually check for future ESM updates for it if you want to stay patched, or roll back to the standard version later with sudo apt install libgsasl7=1.8.1-1.

2. Temporary ESM enablement (for personal users) #

If you're using Ubuntu 20.04 LTS as a personal user, you can enable ESM for free (no paid subscription required) just to install this package, then disable it if you don't want ongoing ESM updates:

• Register your Ubuntu account and enable ESM following the on-screen prompts when running:

  sudo pro attach
  

• Install the package with:

  sudo apt update && sudo apt install libgsasl7=1.8.1-1ubuntu0.1~esm1
  

• If you want to disable ESM afterward, run:

  sudo pro detach
  

Note: Disabling ESM means you won't get future security updates for this or other ESM-only packages, so weigh this against your security needs.

3. Explore alternative mitigations #

If neither of the above works for you, consider these workarounds:

• Check if the vulnerability can be mitigated via configuration: For example, if your application using libgsasl7 doesn't need the specific vulnerable feature, you might disable it instead of updating the library.
• If libgsasl7 isn't critical to your system or apps, you could uninstall it entirely (but only do this if you're sure no installed software depends on it—check with dpkg -l | grep libgsasl7).

备注：内容来源于stack exchange，提问作者shoyone