CVE-2020-26229: XML External Entity in Dashboard Widget
First published: Tue Nov 17 2020(Updated: )
### Problem It has been discovered that RSS widgets are susceptible to XML external entity processing. This vulnerability is reasonable, but is theoretical - it was not possible to actually reproduce the vulnerability with current PHP versions of supported and maintained system distributions. At least with _libxml2_ version 2.9, the processing of XML external entities is disabled per default - and cannot be exploited. Besides that, a valid backend user account is needed. ### Solution Update to TYPO3 version 10.4.10 that fixes the problem described.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/typo3/cms-core | >=10.0.0<10.4.10 | |
| composer/typo3/cms | >=10.0.0<10.4.10 | |
| Typo3 Typo3 | >=10.0.0<10.4.10 | |
| composer/typo3/cms | >=10.0.0<10.4.10 | 10.4.10 |
| composer/typo3/cms-core | >=10.0.0<10.4.10 | 10.4.10 |
| >=10.0.0<10.4.10 |
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Reference Links
- https://typo3.org/security/advisory/typo3-core-sa-2020-012
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-q9cp-mc96-m4w2
- https://nvd.nist.gov/vuln/detail/CVE-2020-26229
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-26229.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-26229.yaml
- https://github.com/advisories/GHSA-q9cp-mc96-m4w2 (Advisory)
Frequently Asked Questions
What is TYPO3-CORE-SA-2020-012: XML External Entity in Dashboard Widget?
TYPO3-CORE-SA-2020-012 is a vulnerability in TYPO3 where RSS widgets are susceptible to XML external entity processing, allowing attackers to potentially access sensitive information.
What is the severity of TYPO3-CORE-SA-2020-012?
The severity of TYPO3-CORE-SA-2020-012 is low, with a severity rating of 3.7 out of 10.
Which versions of TYPO3 are affected by TYPO3-CORE-SA-2020-012?
TYPO3 versions from 10.0.0 up to but excluding 10.4.10 are affected by the TYPO3-CORE-SA-2020-012 vulnerability.
How can an attacker exploit the TYPO3-CORE-SA-2020-012 vulnerability?
An attacker can exploit the TYPO3-CORE-SA-2020-012 vulnerability by manipulating XML external entities in RSS widgets to potentially access sensitive information.
Is there a fix available for TYPO3-CORE-SA-2020-012?
Yes, TYPO3 has released a fix for the TYPO3-CORE-SA-2020-012 vulnerability. It is recommended to update to TYPO3 version 10.4.10 or higher to address the issue.
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