CVE-2020-26229 Vulnerability Analysis & Exploit Details

Status: Analyzed - Last modified: 01 Dec 2020, 20:53 UTC Published: 23 Nov 2020, 22:15 UTC

CVE-2020-26229
Vulnerability Scoring

3.7
/10

Attack Complexity Details

  • Attack Complexity: HIGH IMPACT
  • Attack Vector: NETWORK
  • Privileges Required: Low Impact
  • Scope: UNCHANGED
  • User Interaction: REQUIRED

CIA Impact Definition

  • Confidentiality: Low Impact
  • Integrity:
  • Availability: Low Impact

CVE-2020-26229 Vulnerability Summary

TYPO3 is an open source PHP based web content management system. In TYPO3 from version 10.4.0, and before version 10.4.10, 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. Update to TYPO3 version 10.4.10 to fix the problem described.

Access Complexity Graph

Above is the Access Complexity Graph for CVE-2020-26229. It helps visualize the difficulty level and privilege requirements needed to exploit this vulnerability, providing a quick assessment of its exploitation feasibility.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2020-26229, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

Impact Analysis

Below is the Impact Analysis for CVE-2020-26229, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.076% (probability of exploit)

EPSS Percentile: 35.82% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 64.18% of others.

CVE-2020-26229 Detailed Information and External References

References

CWE

CWE-611

CAPEC

  • Data Serialization External Entities Blowup CAPEC-221 This attack takes advantage of the entity replacement property of certain data serialization languages (e.g., XML, YAML, etc.) where the value of the replacement is a URI. A well-crafted file could have the entity refer to a URI that consumes a large amount of resources to create a denial of service condition. This can cause the system to either freeze, crash, or execute arbitrary code depending on the URI.

Vulnerable Configurations

  • cpe:2.3:a:typo3:typo3:10.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.0.0:*:*:*:elts:*:*:*
    cpe:2.3:a:typo3:typo3:10.0.0:*:*:*:elts:*:*:*
  • cpe:2.3:a:typo3:typo3:10.0.9:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.0.9:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.0.10:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.0.10:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.3:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.4:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.4:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.5:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.5:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.6:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.6:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.7:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.7:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.8:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.8:*:*:*:*:*:*:*
  • cpe:2.3:a:typo3:typo3:10.4.9:*:*:*:*:*:*:*
    cpe:2.3:a:typo3:typo3:10.4.9:*:*:*:*:*:*:*

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

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