PT-2021-21361 · Typo3 · Typo3 Routes Extension

Oliver Hader · Published 2021-08-13 · Updated 2022-07-12 · CVE-2021-36793

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions TYPO3 routes extension versions prior to 2.1.1

Description The issue allows sensitive information disclosure because a session identifier is present in HTML output when CsrfTokenViewHelper is used. This occurs when the extension discloses the user's session identifier to HTML output without additional cryptographic hashing algorithms. The vulnerability cannot be exploited directly and requires a chained attack, such as Cross Site Scripting in the frontend output.

Recommendations For versions prior to 2.1.1, update to version 2.1.1 or later to resolve the issue. As a temporary workaround, consider disabling the CsrfTokenViewHelper until a patch is available. Restrict access to sensitive information to minimize the risk of exploitation.

Fix

Information Disclosure

Exposure of Resource to Wrong Sphere

Weakness Enumeration

CWE-200

CWE-668

Related Identifiers

CVE-2021-36793

GHSA-VPW5-GRXX-V396

Affected Products

Typo3 Routes Extension

References · 7

• https://typo3.org/security/advisory/typo3-ext-sa-2021-008 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-36793 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-36793 · Security Note
• https://osv.dev/vulnerability/GHSA-vpw5-grxx-v396 · Vendor Advisory
• https://typo3.org/help/security-advisories/security · Vendor Advisory
• https://github.com/Lacr1ma/routes · Note
• https://t.me/cibsecurity/27320 · Telegram Post