Remote code execution in Zope

1) Code Injection

EUVDB-ID: #VU55865

Risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-32811

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation within the unsafe classes in otherwise permitted modules. A remote authenticated attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zope: 4.0 - 5.2.1

CPE2.3

• cpe:2.3:a:zope:zope:4.0:*:*:*:*:*:*:*
• cpe:2.3:a:zope:zope:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:zope:zope:4.0.2:*:*:*:*:*:*:*

External links

https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-qcx9-j53g-ccgf
https://github.com/zopefoundation/Zope/security/advisories/GHSA-g4gq-j4p2-j8fr
https://github.com/zopefoundation/Zope/commit/f72a18dda8e9bf2aedb46168761668464a4be988

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.