medium
5.7
CWE
22 200
Advisory Published
CVE Published
Updated

CVE-2021-3426: Path Traversal

First published: Fri Mar 05 2021(Updated: )

Python pydoc module could allow a remote attacker from within the local network obtain sensitive information. By starting the pydoc server, an attacker could exploit this vulnerability to extract arbitrary files.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/python<3.8.9
3.8.9
redhat/python<3.9.3
3.9.3
redhat/python<3.10.0
3.10.0
redhat/python3<0:3.6.8-41.el8
0:3.6.8-41.el8
redhat/rh-python38-babel<0:2.7.0-12.el7
0:2.7.0-12.el7
redhat/rh-python38-python<0:3.8.11-2.el7
0:3.8.11-2.el7
redhat/rh-python38-python-cryptography<0:2.8-5.el7
0:2.8-5.el7
redhat/rh-python38-python-jinja2<0:2.10.3-6.el7
0:2.10.3-6.el7
redhat/rh-python38-python-lxml<0:4.4.1-7.el7
0:4.4.1-7.el7
redhat/rh-python38-python-pip<0:19.3.1-2.el7
0:19.3.1-2.el7
redhat/rh-python38-python-urllib3<0:1.25.7-7.el7
0:1.25.7-7.el7
Python Python<2.7.18
Python Python>=3.6.0<3.6.13
Python Python>=3.7.0<3.7.10
Python Python>=3.8.0<3.8.8
Python Python>=3.9.0<3.9.3
Python Python=3.10.0-alpha1
Python Python=3.10.0-alpha2
Python Python=3.10.0-alpha3
Python Python=3.10.0-alpha4
Python Python=3.10.0-alpha5
Python Python=3.10.0-alpha6
Fedoraproject Fedora=32
Fedoraproject Fedora=33
Fedoraproject Fedora=34
Debian Debian Linux=9.0
Redhat Software Collections
Redhat Enterprise Linux=8.0
Netapp Cloud Backup
NetApp ONTAP Select Deploy administration utility
Netapp Snapcenter
Oracle Communications Cloud Native Core Binding Support Function=1.10.0
Oracle ZFS Storage Appliance Kit=8.8
IBM Cloud Pak for Security<=1.10.0.0 - 1.10.11.0
IBM QRadar Suite Software<=1.10.12.0 - 1.10.16.0

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2021-3426?

    CVE-2021-3426 is a vulnerability in Python 3's pydoc that allows a local or adjacent attacker to access and disclose sensitive information belonging to another user.

  • How does CVE-2021-3426 affect Python 3?

    CVE-2021-3426 affects Python 3 versions 3.8.9, 3.9.3, and 3.10.0.

  • How can the CVE-2021-3426 vulnerability be exploited?

    The CVE-2021-3426 vulnerability can be exploited by a local or adjacent attacker who starts a pydoc server and convinces another user to access it, thereby allowing the attacker to access sensitive information.

  • What is the severity of CVE-2021-3426?

    CVE-2021-3426 has a severity rating of 5.7 (Medium).

  • How can I fix the CVE-2021-3426 vulnerability?

    To fix the CVE-2021-3426 vulnerability, it is recommended to update Python 3 to versions 3.8.9, 3.9.3, or 3.10.0.

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