USN-4754-3

Advisory lineage Upstream: 14 Downstream: 0
Published: 12 Mar 2021, 14:07
Last modified:27 Apr 2026, 16:03

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 Mar 2021, 14:07
Published
Vulnerability first disclosed
27 Apr 2026, 16:03
Last Modified
Vulnerability information updated

Description

python2.7, python3.7, python3.8 vulnerabilities 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)

Affected Systems

  • ubuntu•python2.7

    < 2.7.18-1~20.04.1

  • ubuntu•python3.7

    < 3.7.5-2~18.04.4

  • ubuntu•python3.8

    < 3.8.0-3~18.04.1

References (8)