Ubuntu 4247-3: python-apt vulnerabilities | LinuxSecurity.com
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Ubuntu Security Notice USN-4247-3
January 23, 2020

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in python-apt.

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

Details:

USN-4247-1 fixed several vulnerabilities in python-apt. This update
provides the corresponding updates for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

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 14.04 ESM:
  python-apt                      0.9.3.5ubuntu3+esm2
  python3-apt                     0.9.3.5ubuntu3+esm2

Ubuntu 12.04 ESM:
  python-apt                      0.8.3ubuntu7.5
  python3-apt                     0.8.3ubuntu7.5

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

References:
  https://usn.ubuntu.com/4247-3
  https://usn.ubuntu.com/4247-1
  CVE-2019-15795, CVE-2019-15796

Ubuntu 4247-3: python-apt vulnerabilities

January 23, 2020

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 ESM - Ubuntu 12.04 ESM Summary: Several security issues were fixed in python-apt. Software Description: - python-apt: Python interface to libapt-pkg Details: USN-4247-1 fixed several vulnerabilities in python-apt. This update provides the corresponding updates for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. 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 14.04 ESM: python-apt 0.9.3.5ubuntu3+esm2 python3-apt 0.9.3.5ubuntu3+esm2 Ubuntu 12.04 ESM: python-apt 0.8.3ubuntu7.5 python3-apt 0.8.3ubuntu7.5 In general, a standard system update will make all the necessary changes.

References

https://usn.ubuntu.com/4247-3

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

CVE-2019-15795, CVE-2019-15796

Severity
Ubuntu Security Notice USN-4247-3

Package Information

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