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CVE-2021-32633— Remote Code Execution via traversal in TAL expressions

Quick assessment

Affected
zopefoundation Zope
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.

Zope是Zope（ZOPE）社区的一套使用Python语言编写的、面向对象的开源Web应用服务器。 Zope 在4.6之前版本和5.2版本存在安全漏洞，该漏洞允许不受信任的用户通过web添加编辑Zope页面模板的站点，从而触发该漏洞。

CVSS 6.8 · Medium EPSS 1.86% · P79

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2021-32633

Vulnerability Information
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Vulnerability Title
Remote Code Execution via traversal in TAL expressions
Source: CVE Program / CVE List V5
Vulnerability Description
Zope is an open-source web application server. In Zope versions prior to 4.6 and 5.2, users can access untrusted modules indirectly through Python modules that are available for direct use. By default, only users with the Manager role can add or edit Zope Page Templates through the web, but sites that allow untrusted users to add/edit Zope Page Templates through the web are at risk from this vulnerability. The problem has been fixed in Zope 5.2 and 4.6. As a workaround, a site administrator can restrict adding/editing Zope Page Templates through the web using the standard Zope user/role permission mechanisms. Untrusted users should not be assigned the Zope Manager role and adding/editing Zope Page Templates through the web should be restricted to trusted users only.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Zope 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zope是Zope（ZOPE）社区的一套使用Python语言编写的、面向对象的开源Web应用服务器。 Zope 在4.6之前版本和5.2版本存在安全漏洞，该漏洞允许不受信任的用户通过web添加编辑Zope页面模板的站点，从而触发该漏洞。
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
zopefoundation Zope < 4.6 -

II. Public POCs for CVE-2021-32633

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III. Intelligence Information for CVE-2021-32633

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Patches & Fixes for CVE-2021-32633 (1)

Vendor Advisories for CVE-2021-32633 (1)

Mailing List Discussions for CVE-2021-32633 (2)

Security Blog Posts for CVE-2021-32633 (1)

IV. Related Vulnerabilities

Same product: Zope
Same vendor: zopefoundation
Same weakness: CWE-22

V. Comments for CVE-2021-32633

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