Zope up to 4.8.9/5.8.4 SVG Image cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in Zope up to 4.8.9/5.8.4. Affected is an unknown function of the component SVG Image Handler. This manipulation causes cross site scripting. This vulnerability is handled as CVE-2023-42458. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Zope up to 4.8.9/5.8.4 (Application Server Software) and classified as problematic. Affected by this vulnerability is some unknown functionality of the component SVG Image Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. As an impact it is known to affect integrity. The summary by CVE is:

Zope is an open-source web application server. Prior to versions 4.8.10 and 5.8.5, there is a stored cross site scripting vulnerability for SVG images. Note that an image tag with an SVG image as source is never vulnerable, even when the SVG image contains malicious code. To exploit the vulnerability, an attacker would first need to upload an image, and then trick a user into following a specially crafted link. Patches are available in Zope 4.8.10 and 5.8.5. As a workaround, make sure the "Add Documents, Images, and Files" permission is only assigned to trusted roles. By default, only the Manager has this permission.

The weakness was released 09/21/2023 as GHSA-wm8q-9975-xh5v. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-42458 since 09/08/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 300605 (Plone Python Library Multiple Vulnerabilities (20230921)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.8.10 or 5.8.5 eliminates this vulnerability. Applying the patch 26a55dbc301db417f47cafda6fe0f983b5690088 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (300605). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Application Server Software

Name

• Zope

Version

• 4.8.0
• 4.8.1
• 4.8.2
• 4.8.3
• 4.8.4
• 4.8.5
• 4.8.6
• 4.8.7
• 4.8.8
• 4.8.9
• 5.8.0
• 5.8.1
• 5.8.2
• 5.8.3
• 5.8.4

License

• open-source

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CPE 2.2info

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