CVE-2021-40511 — HIGH (7.5)

Vulnerability Description

OBDA systems’ Mastro 1.0 is vulnerable to XML Entity Expansion (aka “billion laughs”) attack allowing denial of service.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Obdasystems	Mastro	1.0

Related Weaknesses (CWE)

CWE-776

References

https://www.cyberiskvision.com/advisory/Third Party Advisory
https://www.obdasystems.com/mastroProductVendor Advisory
https://www.cyberiskvision.com/advisory/Third Party Advisory
https://www.obdasystems.com/mastroProductVendor Advisory

FAQ

What is CVE-2021-40511?

CVE-2021-40511 is a vulnerability with a CVSS score of 7.5 (HIGH). OBDA systems’ Mastro 1.0 is vulnerable to XML Entity Expansion (aka “billion laughs”) attack allowing denial of service.

How severe is CVE-2021-40511?

CVE-2021-40511 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-40511?

Check the references section above for vendor advisories and patch information. Affected products include: Obdasystems Mastro.