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.

According to the versions of the python packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - 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-2021-3177)

  - 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-2021-3733)

  - 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-2021-3737)

  - 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-2021-23336)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3575 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3575-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                        Helmut Grohne     September 20, 2023                            https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : python2.7     Version        : 2.7.16-2+deb10u3     CVE ID         : CVE-2021-23336 CVE-2022-0391 CVE-2022-48560 CVE-2022-48565                      CVE-2022-48566 CVE-2023-24329 CVE-2023-40217

    This update fixes multiple vulnerabilities concerning the urlparse module as     well as vulnerabilities concerning the heapq, hmac, plistlib and ssl modules.

    CVE-2021-23336

        Python was vulnerable to Web Cache Poisoning via urlparse.parse_qsl and         urlparse.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-2022-0391

        The urlparse 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.

    CVE-2022-48560

        A use-after-free exists in Python via heappushpop in heapq.

    CVE-2022-48565

        An XML External Entity (XXE) issue was discovered in Python.  The plistlib         module no longer accepts entity declarations in XML plist files to avoid         XML vulnerabilities.

    CVE-2022-48566

        An issue was discovered in compare_digest in Lib/hmac.py in Python.
        Constant-time-defeating optimisations were possible in the accumulator         variable in hmac.compare_digest.

    CVE-2023-24329

        An issue in the urlparse component of Python allows attackers to bypass         blocklisting methods by supplying a URL that starts with blank characters.

    CVE-2023-40217

        The issue primarily affects servers written in Python (such as HTTP         servers) that use TLS client authentication. If a TLS server-side socket is         created, receives data into the socket buffer, and then is closed quickly,         there is a brief window where the SSLSocket instance will detect the socket         as not connected and won't initiate a handshake, but buffered data will         still be readable from the socket buffer.  This data will not be         authenticated if the server-side TLS peer is expecting client certificate         authentication, and is indistinguishable from valid TLS stream data. Data         is limited in size to the amount that will fit in the buffer. (The TLS         connection cannot directly be used for data exfiltration because the         vulnerable code path requires that the connection be closed on         initialization of the SSLSocket.)


    For Debian 10 buster, these problems have been fixed in version     2.7.16-2+deb10u3.

    We recommend that you upgrade your python2.7 packages.

    For the detailed security status of python2.7 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/python2.7

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

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

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

An update of the python3 package has been released.

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	名称	产品	系列	发布时间	最近更新时间	严重程度
155064	CentOS 8 : python38:3.8 and python38-devel:3.8 (CESA-2021:4162)	Nessus	CentOS Local Security Checks	2021/11/11	2024/1/16	critical
156495	EulerOS Virtualization 3.0.2.6 : python (EulerOS-SA-2021-2875)	Nessus	Huawei Local Security Checks	2022/1/6	2023/11/21	critical
181697	Debian dla-3575 : idle-python2.7 - security update	Nessus	Debian Local Security Checks	2023/9/20	2025/1/22	critical
202860	Photon OS 3.0: Python3 PHSA-2021-3.0-0204	Nessus	PhotonOS Local Security Checks	2024/7/22	2024/7/22	medium
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	2025/5/14	2025/5/14	critical

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