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AUSCERT External Security Bulletin Redistribution
ESB-2020.0239.3
USN-4247-1: python-apt vulnerabilities
24 January 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: python-apt
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-15796 CVE-2019-15795
Original Bulletin:
https://usn.ubuntu.com/4247-2/
https://usn.ubuntu.com/4247-3/
Comment: This bulletin contains two (2) Ubuntu security advisories.
This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running python-apt check for an updated version of the software for
their operating system.
Revision History: January 24 2020: Vendor released updated advisory USN-4247-3
January 23 2020: Updated packages due to regression
January 23 2020: Initial Release
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USN-4247-2: python-apt regression
22 January 2020
python-apt regression
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.10
o Ubuntu 19.04
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
USN-4247-1 introduced a regression in python-apt.
Software Description
o 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
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o USN-4247-1
o LP: 1860606
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USN-4247-3: python-apt vulnerabilities
23 January 2020
python-apt vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Summary
Several security issues were fixed in python-apt.
Software Description
o 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
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o USN-4247-1
o CVE-2019-15795
o CVE-2019-15796
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