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CVE-2021-32798— Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) in notebook

Quick assessment

Affected
jupyter notebook
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Jupyter Notebook是一套用于创建、共享代码和说明性文本文档的开源Web应用程序。 Jupyter notebook 存在安全漏洞，该漏洞源于Jupyter Notebook使用不推荐的Google Caja版本来清理用户输入。当受害者在Jupyter notebook中打开恶意ipynb文档时，可以触发XSS。攻击者可利用该漏洞在受害者计算机上执行任意代码

CVSS 10.0 · Critical EPSS 2.11% · P81
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I. Basic Information for CVE-2021-32798

Vulnerability Information
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Vulnerability Title
Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) in notebook
Source: CVE Program / CVE List V5
Vulnerability Description
The Jupyter notebook is a web-based notebook environment for interactive computing. In affected versions untrusted notebook can execute code on load. Jupyter Notebook uses a deprecated version of Google Caja to sanitize user inputs. A public Caja bypass can be used to trigger an XSS when a victim opens a malicious ipynb document in Jupyter Notebook. The XSS allows an attacker to execute arbitrary code on the victim computer using Jupyter APIs.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Jupyter Notebook 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jupyter Notebook是一套用于创建、共享代码和说明性文本文档的开源Web应用程序。 Jupyter notebook 存在安全漏洞，该漏洞源于Jupyter Notebook使用不推荐的Google Caja版本来清理用户输入。当受害者在Jupyter notebook中打开恶意ipynb文档时，可以触发XSS。攻击者可利用该漏洞在受害者计算机上执行任意代码
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jupyter notebook >= 6.0.0, < 6.4.1 -

II. Public POCs for CVE-2021-32798

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III. Intelligence Information for CVE-2021-32798

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Patches & Fixes for CVE-2021-32798 (1)

Vendor Advisories for CVE-2021-32798 (1)

IV. Related Vulnerabilities

Same product: notebook
Same vendor: jupyter
Same weakness: CWE-79

V. Comments for CVE-2021-32798

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