USN-4754-3

    Dashboard / Vulnerabilities / USN-4754-3

    USN-4754-3

    Published: 12 Mar 2021Last Modified: 27 Apr 2026

    Summary: python2.7, python3.7, python3.8 vulnerabilities

    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)

    References: https://ubuntu.com/security/notices/USN-4754-3, https://ubuntu.com/security/CVE-2019-9674, https://ubuntu.com/security/CVE-2019-17514, https://ubuntu.com/security/CVE-2019-20907, https://ubuntu.com/security/CVE-2020-8492, https://ubuntu.com/security/CVE-2020-26116, https://ubuntu.com/security/CVE-2020-27619, https://ubuntu.com/security/CVE-2021-3177

    Affected packages

    Package

    Name: python3.7

    Purl: pkg:deb/ubuntu/[email protected]~18.04.4?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.7.5-2~18.04.4

    Affected versions

    3.7.0~a2-1
    3.7.0~a3-1
    3.7.0~a3-2
    3.7.0~a3-3
    3.7.0~a4-1
    3.7.0~b1-1
    3.7.0~b1-1build1
    3.7.0~b2-1
    3.7.0~b3-1
    3.7.0-1~18.04
    3.7.1-1~18.04
    3.7.3-2~18.04.1
    3.7.5-2~18.04

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    USN-4754-3 | CVE-DB