The remote Oracle Linux 8 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2021-4324 advisory.

    [5.4.3-11]
    - Security fix for CVE-2019-18874: double free because of refcount mishandling     Resolves: rhbz#1772014

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Red Hat Enterprise Linux CoreOS 4 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2020:2593 advisory.

  - python-psutil: Double free because of refcount mishandling (CVE-2019-18874)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2020:2583 advisory.

    Red Hat OpenShift Container Platform is Red Hat's cloud computing     Kubernetes application platform solution designed for on-premise or private     cloud deployments.

    Security Fix(es):

    * python-psutil: A double free issue has been discovered in python-psutil that may allow a local attacker     to get code execution with the privileges of the user running the python-psutil application.
    (CVE-2019-18874)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2021:4162 advisory.

  - python-psutil: Double free because of refcount mishandling (CVE-2019-18874)

  - python: Unsafe use of eval() on data retrieved via HTTP in the test suite (CVE-2020-27619)

  - python-jinja2: ReDoS vulnerability in the urlize filter (CVE-2020-28493)

  - python: Web cache poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a semicolon in     query parameters (CVE-2021-23336)

  - python-lxml: Missing input sanitization for formaction HTML5 attributes may lead to XSS (CVE-2021-28957)

  - python-ipaddress: Improper input validation of octal strings (CVE-2021-29921)

  - python-urllib3: ReDoS in the parsing of authority part of URL (CVE-2021-33503)

  - python: Information disclosure via pydoc (CVE-2021-3426)

  - python-pip: Incorrect handling of unicode separators in git references (CVE-2021-3572)

  - python-babel: Relative path traversal allows attacker to load arbitrary locale files and     execute arbitrary code (CVE-2021-42771)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2024:0262 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2019-18874:
    psutil (aka python-psutil) through 5.6.5 can have a double free. This occurs because of refcount     mishandling within a while or for loop that converts system data into a Python object.

    CVE-2019-20477:
    PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a     class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists     because of an incomplete fix for CVE-2017-18342.

    CVE-2019-20907:
    In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an     infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.

    CVE-2020-14343:
    A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to     arbitrary code execution when it processes untrusted YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this     flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the     python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.

    CVE-2020-14422:
    Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and     IPv6Interface classes, which might allow a remote attacker to cause a denial of service if an application     is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this     attacker can cause many dictionary entries to be created. This is fixed in: v3.5.10, v3.5.10rc1; v3.6.12;
    v3.7.9; v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1; v3.9.0, v3.9.0b4, v3.9.0b5, v3.9.0rc1, v3.9.0rc2.

    CVE-2020-27619:
    In Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec tests call eval() on content     retrieved via HTTP.

    CVE-2020-8492:
    Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10, 3.7 through 3.7.6, and 3.8 through 3.8.1     allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client     because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking.

    CVE-2021-23336:
    The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before     3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and     urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query     parameters using a semicolon (;), they can cause a difference in the interpretation of the request between     the proxy (running with default configuration) and the server. This can result in malicious requests being     cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and     therefore would not include it in a cache key of an unkeyed parameter.

    CVE-2021-29921:
    In Python before 3,9,5, the ipaddress library mishandles leading zero characters in the octets of an IP     address string. This (in some situations) allows attackers to bypass access control that is based on IP     addresses.

    CVE-2021-3177:
    Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to     remote code execution in certain Python applications that accept floating-point numbers as untrusted     input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used     unsafely.

    CVE-2021-3426:
    There's a flaw in Python 3's pydoc. A local or adjacent attacker who discovers or is able to convince     another local or adjacent user to start a pydoc server could access the server and use it to disclose     sensitive information belonging to the other user that they would not normally be able to access. The     highest risk of this flaw is to data confidentiality. This flaw affects Python versions before 3.8.9,     Python versions before 3.9.3 and Python versions before 3.10.0a7.

    CVE-2021-3733:
    There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP     server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of     Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the     server to the client. The greatest threat that this flaw poses is to application availability.

    CVE-2021-3737:
    A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may     allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop,     consuming CPU time. The highest threat from this vulnerability is to system availability.

    CVE-2021-43818:
    lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML     Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG     files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should     upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available.

    CVE-2022-0391:
    A flaw was found in Python, specifically within the urllib.parse module. This module helps break Uniform     Resource Locator (URL) strings into components. The issue involves how the urlparse method does not     sanitize input and allows characters like '\r' and '\n' in the URL path. This flaw allows an attacker to     input a crafted URL, leading to injection attacks. This flaw affects Python versions prior to 3.10.0b1,     3.9.5, 3.8.11, 3.7.11 and 3.6.14.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
155410	Oracle Linux 8 : python-psutil (ELSA-2021-4324)	Nessus	Oracle Linux Local Security Checks	11/17/2021	10/22/2024	high
312546	RHCOS 4 : OpenShift Container Platform 4.2.36 python-psutil (RHSA-2020:2593)	Nessus	Red Hat Local Security Checks	5/6/2026	5/6/2026	high
137726	RHEL 7 : OpenShift Container Platform 4.4.9 python-psutil (RHSA-2020:2583)	Nessus	Red Hat Local Security Checks	6/23/2020	11/7/2024	high
155064	CentOS 8 : python38:3.8 and python38-devel:3.8 (CESA-2021:4162)	Nessus	CentOS Local Security Checks	11/11/2021	1/16/2024	critical
236082	Alibaba Cloud Linux 3 : 0262: python38:3.8 and python38-devel:3.8 (ALINUX3-SA-2024:0262)	Nessus	Alibaba Cloud Linux Local Security Checks	5/14/2025	5/14/2025	critical

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