Ubuntu 4247-2: python-apt regression | LinuxSecurity.com
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Ubuntu Security Notice USN-4247-2
January 22, 2020

python-apt regression
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.10
- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

USN-4247-1 introduced a regression in python-apt.

Software Description:
- python-apt: Python interface to libapt-pkg

Details:

USN-4247-1 fixed vulnerabilities in python-apt. The updated packages caused
a regression when attempting to upgrade to a new Ubuntu release. This
update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 It was discovered that python-apt would still use MD5 hashes to validate
 certain downloaded packages. If a remote attacker were able to perform a
 man-in-the-middle attack, this flaw could potentially be used to install
 altered packages. (CVE-2019-15795)
  It was discovered that python-apt could install packages from untrusted
 repositories, contrary to expectations. (CVE-2019-15796)

Update instructions:

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

Ubuntu 19.10:
  python-apt                      1.9.0ubuntu1.3
  python3-apt                     1.9.0ubuntu1.3

Ubuntu 19.04:
  python-apt                      1.8.5~ubuntu0.3
  python3-apt                     1.8.5~ubuntu0.3

Ubuntu 18.04 LTS:
  python-apt                      1.6.5ubuntu0.2
  python3-apt                     1.6.5ubuntu0.2

Ubuntu 16.04 LTS:
  python-apt                      1.1.0~beta1ubuntu0.16.04.8
  python3-apt                     1.1.0~beta1ubuntu0.16.04.8

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

References:
  https://usn.ubuntu.com/4247-2
  https://usn.ubuntu.com/4247-1
  https://launchpad.net/bugs/1860606

Package Information:
  https://launchpad.net/ubuntu/+source/python-apt/1.9.0ubuntu1.3
  https://launchpad.net/ubuntu/+source/python-apt/1.8.5~ubuntu0.3
  https://launchpad.net/ubuntu/+source/python-apt/1.6.5ubuntu0.2
  https://launchpad.net/ubuntu/+source/python-apt/1.1.0~beta1ubuntu0.16.04.8

Ubuntu 4247-2: python-apt regression

January 22, 2020

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 19.10 - Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: USN-4247-1 introduced a regression in python-apt. Software Description: - python-apt: Python interface to libapt-pkg Details: USN-4247-1 fixed vulnerabilities in python-apt. The updated packages caused a regression when attempting to upgrade to a new Ubuntu release. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that python-apt would still use MD5 hashes to validate certain downloaded packages. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could potentially be used to install altered packages. (CVE-2019-15795) It was discovered that python-apt could install packages from untrusted repositories, contrary to expectations. (CVE-2019-15796)

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 19.10: python-apt 1.9.0ubuntu1.3 python3-apt 1.9.0ubuntu1.3 Ubuntu 19.04: python-apt 1.8.5~ubuntu0.3 python3-apt 1.8.5~ubuntu0.3 Ubuntu 18.04 LTS: python-apt 1.6.5ubuntu0.2 python3-apt 1.6.5ubuntu0.2 Ubuntu 16.04 LTS: python-apt 1.1.0~beta1ubuntu0.16.04.8 python3-apt 1.1.0~beta1ubuntu0.16.04.8 In general, a standard system update will make all the necessary changes.

References

https://usn.ubuntu.com/4247-2

https://usn.ubuntu.com/4247-1

https://launchpad.net/bugs/1860606

Severity
Ubuntu Security Notice USN-4247-2

Package Information

https://launchpad.net/ubuntu/+source/python-apt/1.9.0ubuntu1.3 https://launchpad.net/ubuntu/+source/python-apt/1.8.5~ubuntu0.3 https://launchpad.net/ubuntu/+source/python-apt/1.6.5ubuntu0.2 https://launchpad.net/ubuntu/+source/python-apt/1.1.0~beta1ubuntu0.16.04.8

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