Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title Python vulnerabilities
Informations
NameUSN-4127-1First vendor Publication2019-09-09
VendorUbuntuLast vendor Modification2019-09-09
Severity (Vendor) N/ARevisionN/A

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:N)
Cvss Base Score6.4Attack RangeNetwork
Cvss Impact Score4.9Attack ComplexityLow
Cvss Expoit Score10AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Python.

Software Description: - python2.7: An interactive high-level object-oriented language - python3.7: An interactive high-level object-oriented language - python3.6: An interactive high-level object-oriented language - python3.5: An interactive high-level object-oriented language

Details:

It was discovered that Python incorrectly handled certain pickle files. An attacker could possibly use this issue to consume memory, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-20406)

It was discovered that Python incorrectly validated the domain when handling cookies. An attacker could possibly trick Python into sending cookies to the wrong domain. (CVE-2018-20852)

Jonathan Birch and Panayiotis Panayiotou discovered that Python incorrectly handled Unicode encoding during NFKC normalization. An attacker could possibly use this issue to obtain sensitive information. (CVE-2019-9636, CVE-2019-10160)

Colin Read and Nicolas Edet discovered that Python incorrectly handled parsing certain X509 certificates. An attacker could possibly use this issue to cause Python to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-5010)

It was discovered that Python incorrectly handled certain urls. A remote attacker could possibly use this issue to perform CRLF injection attacks. (CVE-2019-9740, CVE-2019-9947)

Sihoon Lee discovered that Python incorrectly handled the local_file: scheme. A remote attacker could possibly use this issue to bypass blacklist meschanisms. (CVE-2019-9948)

Update instructions:

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

Ubuntu 19.04:
python2.7 2.7.16-2ubuntu0.1
python2.7-minimal 2.7.16-2ubuntu0.1
python3.7 3.7.3-2ubuntu0.1
python3.7-minimal 3.7.3-2ubuntu0.1

Ubuntu 18.04 LTS:
python2.7 2.7.15-4ubuntu4~18.04.1
python2.7-minimal 2.7.15-4ubuntu4~18.04.1
python3.6 3.6.8-1~18.04.2
python3.6-minimal 3.6.8-1~18.04.2

Ubuntu 16.04 LTS:
python2.7 2.7.12-1ubuntu0~16.04.8
python2.7-minimal 2.7.12-1ubuntu0~16.04.8
python3.5 3.5.2-2ubuntu0~16.04.8
python3.5-minimal 3.5.2-2ubuntu0~16.04.8

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

References:
https://usn.ubuntu.com/4127-1
CVE-2018-20406, CVE-2018-20852, CVE-2019-10160, CVE-2019-5010,
CVE-2019-9636, CVE-2019-9740, CVE-2019-9947, CVE-2019-9948

Package Information:
https://launchpad.net/ubuntu/+source/python2.7/2.7.16-2ubuntu0.1
https://launchpad.net/ubuntu/+source/python3.7/3.7.3-2ubuntu0.1
https://launchpad.net/ubuntu/+source/python2.7/2.7.15-4ubuntu4~18.04.1
https://launchpad.net/ubuntu/+source/python3.6/3.6.8-1~18.04.2
https://launchpad.net/ubuntu/+source/python2.7/2.7.12-1ubuntu0~16.04.8
https://launchpad.net/ubuntu/+source/python3.5/3.5.2-2ubuntu0~16.04.8

Original Source

Url : http://www.ubuntu.com/usn/USN-4127-1

CWE : Common Weakness Enumeration

%idName
29 %CWE-255Credentials Management
29 %CWE-93Failure to Sanitize CRLF Sequences ('CRLF Injection')
14 %CWE-254Security Features
14 %CWE-190Integer Overflow or Wraparound (CWE/SANS Top 25)
14 %CWE-20Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Application1
Application328
Os1
Os3
Os1
Os5
Os1
Os1
Os1
Os1
Os1
Os1

Alert History

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0
1
DateInformations
2019-09-11 12:07:19
  • Multiple Updates
2019-09-09 21:19:08
  • First insertion