Ubuntu Security Notice 3817-1 - It was discovered that Python incorrectly handled large amounts of data. A remote attacker could use this issue to cause Python to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. It was discovered that Python incorrectly handled running external commands in the shutil module. A remote attacker could use this issue to cause Python to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.
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Ubuntu Security Notice USN-3817-1
November 13, 2018
python2.7, python3.4, python3.5 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in Python.
Software Description:
- python2.7: An interactive high-level object-oriented language
- python3.5: An interactive high-level object-oriented language
- python3.4: An interactive high-level object-oriented language
Details:
It was discovered that Python incorrectly handled large amounts of data. A
remote attacker could use this issue to cause Python to crash, resulting in
a denial of service, or possibly execute arbitrary code. This issue only
affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2018-1000030)
It was discovered that Python incorrectly handled running external commands
in the shutil module. A remote attacker could use this issue to cause
Python to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2018-1000802)
It was discovered that Python incorrectly used regular expressions
vulnerable to catastrophic backtracking. A remote attacker could possibly
use this issue to cause a denial of service. This issue only affected
Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2018-1060, CVE-2018-1061)
It was discovered that Python failed to initialize Expat's hash salt. A
remote attacker could possibly use this issue to cause hash collisions,
leading to a denial of service. (CVE-2018-14647)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
python2.7 2.7.15~rc1-1ubuntu0.1
python2.7-minimal 2.7.15~rc1-1ubuntu0.1
Ubuntu 16.04 LTS:
python2.7 2.7.12-1ubuntu0~16.04.4
python2.7-minimal 2.7.12-1ubuntu0~16.04.4
python3.5 3.5.2-2ubuntu0~16.04.5
python3.5-minimal 3.5.2-2ubuntu0~16.04.5
Ubuntu 14.04 LTS:
python2.7 2.7.6-8ubuntu0.5
python2.7-minimal 2.7.6-8ubuntu0.5
python3.4 3.4.3-1ubuntu1~14.04.7
python3.4-minimal 3.4.3-1ubuntu1~14.04.7
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3817-1
CVE-2018-1000030, CVE-2018-1000802, CVE-2018-1060, CVE-2018-1061,
CVE-2018-14647
Package Information:
https://launchpad.net/ubuntu/+source/python2.7/2.7.15~rc1-1ubuntu0.1
https://launchpad.net/ubuntu/+source/python2.7/2.7.12-1ubuntu0~16.04.4
https://launchpad.net/ubuntu/+source/python3.5/3.5.2-2ubuntu0~16.04.5
https://launchpad.net/ubuntu/+source/python2.7/2.7.6-8ubuntu0.5
https://launchpad.net/ubuntu/+source/python3.4/3.4.3-1ubuntu1~14.04.7