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Vulnerability Details : 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.
Publish Date : 2021-12-13 Last Update Date : 2022-04-20
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Cross Site Scripting
CWE ID 79

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2022:1763: python39:3.9 and python39-devel:3.9 security update (Moderate) oval:com.redhat.rhsa:def:20221763 unix
RHSA-2022:1764: python38:3.8 and python38-devel:3.8 security update (Moderate) oval:com.redhat.rhsa:def:20221764 unix
RHSA-2022:1821: python27:2.7 security update (Moderate) oval:com.redhat.rhsa:def:20221821 unix
RHSA-2022:1932: python-lxml security update (Moderate) oval:com.redhat.rhsa:def:20221932 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2021-43818

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
3 OS Debian Debian Linux 11.0 * * * Version Details Vulnerabilities
4 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
5 OS Fedoraproject Fedora 35 * * * Version Details Vulnerabilities
6 Application Lxml Lxml * * * * Version Details Vulnerabilities
7 Application Netapp Solidfire - * * * Version Details Vulnerabilities
8 Application Netapp Solidfire Enterprise Sds - * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 3
Fedoraproject Fedora 2
Lxml Lxml 1
Netapp Solidfire 1
Netapp Solidfire Enterprise Sds 1

- References For CVE-2021-43818

https://security.netapp.com/advisory/ntap-20220107-0005/ CONFIRM
https://github.com/lxml/lxml/commit/f2330237440df7e8f39c3ad1b1aa8852be3b27c0
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TUIS2KE3HZ2AAQKXFLTJFZPP2IFHJTC7/
FEDORA FEDORA-2022-96c79bf003
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V2XMOM5PFT6U5AAXY6EFNT5JZCKKHK2V/
FEDORA FEDORA-2022-7129fbaeed
https://www.debian.org/security/2022/dsa-5043
DEBIAN DSA-5043
https://www.oracle.com/security-alerts/cpuapr2022.html
https://lists.debian.org/debian-lts-announce/2021/12/msg00037.html
MLIST [debian-lts-announce] 20211230 [SECURITY] [DLA 2871-1] lxml security update
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQ4SPKJX3RRJK4UWA6FXCRHD2TVRQI44/
FEDORA FEDORA-2021-6e8fb79f90
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WZGNET2A4WGLSUXLBFYKNC5PXHQMI3I7/
FEDORA FEDORA-2021-9f9e7c5c4f
https://github.com/lxml/lxml/security/advisories/GHSA-55x5-fj6c-h6m8 CONFIRM
https://github.com/lxml/lxml/commit/a3eacbc0dcf1de1c822ec29fb7d090a4b1712a9c#diff-59130575b4fb2932c957db2922977d7d89afb0b2085357db1a14615a2fcad776
https://github.com/lxml/lxml/commit/12fa9669007180a7bb87d990c375cf91ca5b664a

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0

- Metasploit Modules Related To CVE-2021-43818

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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