9.9
CRITICAL
CVE-2023-35926
Backstage Scaffolder-Backend Remote Code Execution Vulnerability
Description

Backstage is an open platform for building developer portals. The Backstage scaffolder-backend plugin uses a templating library that requires sandbox, as it by design allows for code injection. The library used for this sandbox so far has been `vm2`, but in light of several past vulnerabilities and existing vulnerabilities that may not have a fix, the plugin has switched to using a different sandbox library. A malicious actor with write access to a registered scaffolder template could manipulate the template in a way that allows for remote code execution on the scaffolder-backend instance. This was only exploitable in the template YAML definition itself and not by user input data. This is vulnerability is fixed in version 1.15.0 of `@backstage/plugin-scaffolder-backend`.

INFO

Published Date :

June 22, 2023, 2:15 p.m.

Last Modified :

June 29, 2023, 8:54 p.m.

Remotely Exploitable :

Yes !

Impact Score :

6.0

Exploitability Score :

3.1
Public PoC/Exploit Available at Github

CVE-2023-35926 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-35926 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linuxfoundation backstage
1 Backstage backstage
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-35926.

URL Resource
https://github.com/backstage/backstage/commit/fb7375507d56faedcb7bb3665480070593c8949a Patch
https://github.com/backstage/backstage/releases/tag/v1.15.0 Release Notes
https://github.com/backstage/backstage/security/advisories/GHSA-wg6p-jmpc-xjmr Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

Updated: 2 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : Sept. 1, 2020, 4:44 a.m. This repo has been linked 14 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-35926 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-35926 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jun. 29, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
    Changed Reference Type https://github.com/backstage/backstage/commit/fb7375507d56faedcb7bb3665480070593c8949a No Types Assigned https://github.com/backstage/backstage/commit/fb7375507d56faedcb7bb3665480070593c8949a Patch
    Changed Reference Type https://github.com/backstage/backstage/releases/tag/v1.15.0 No Types Assigned https://github.com/backstage/backstage/releases/tag/v1.15.0 Release Notes
    Changed Reference Type https://github.com/backstage/backstage/security/advisories/GHSA-wg6p-jmpc-xjmr No Types Assigned https://github.com/backstage/backstage/security/advisories/GHSA-wg6p-jmpc-xjmr Vendor Advisory
    Added CWE NIST CWE-94
    Added CPE Configuration OR *cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* versions up to (excluding) 1.15.0
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-35926 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-35926 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.74 }} 0.07%

score

0.81100

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability