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ubuntuUbuntuUSN-4754-3
HistoryMar 12, 2021 - 12:00 a.m.

Python vulnerabilities

2021-03-1200:00:00
ubuntu.com
180

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.7

Confidence

Low

EPSS

0.038

Percentile

91.9%

Releases

  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 ESM

Packages

  • python2.7 - An interactive high-level object-oriented language
  • python3.7 - An interactive high-level object-oriented language
  • python3.8 - An interactive high-level object-oriented language

Details

USN-4754-1 fixed vulnerabilities in Python. This update provides
the corresponding updates for Ubuntu 18.04 and Ubuntu 20.04.

In the case of Python 2.7 for 20.04, these additional fixes are included:

It was dicovered that Python allowed remote attackers to cause a denial of
service (resource consumption) via a ZIP bomb. (CVE-2019-9674)

It was discovered that Python had potentially misleading information about
whether sorting occurs. This fix updates the documentation about it.
(CVE-2019-17514)

It was discovered that Python incorrectly handled certain TAR archives.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2019-20907)

It was discovered that Python allowed an HTTP server to conduct Regular
Expression Denial of Service (ReDoS) attacks against a client because of
urllib.request.AbstractBasicAuthHandler catastrophic backtracking.
(CVE-2020-8492)

It was discovered that Python allowed CRLF injection if the attacker controls
the HTTP request method, as demonstrated by inserting CR and LF control
characters in the first argument of HTTPConnection.request. (CVE-2020-26116)

Original advisory details:

It was discovered that Python incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code
or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)

Rows per page:
1-10 of 401

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.7

Confidence

Low

EPSS

0.038

Percentile

91.9%