Vulnerability Details : CVE-2021-40511
OBDA systems’ Mastro 1.0 is vulnerable to XML Entity Expansion (aka “billion laughs”) attack allowing denial of service.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2021-40511
Probability of exploitation activity in the next 30 days: 0.10%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 41 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-40511
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-40511
-
The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-40511
-
https://www.obdasystems.com/mastro
Home - OBDA SystemsProduct;Vendor Advisory
-
https://www.cyberiskvision.com/advisory/
Advisory - Joshua CybeRiskVisionThird Party Advisory
Products affected by CVE-2021-40511
- cpe:2.3:a:obdasystems:mastro:1.0:*:*:*:*:*:*:*