RFD Protection Bypass via jsessionid
CVE-2020-5421

8.7HIGH

Key Information:

Vendor
Spring By Vmware
Status
Spring Framework
Vendor
CVE Published:
19 September 2020

Badges

๐Ÿ‘พ Exploit Exists๐ŸŸก Public PoC

Summary

In Spring Framework versions 5.2.0 - 5.2.8, 5.1.0 - 5.1.17, 5.0.0 - 5.0.18, 4.3.0 - 4.3.28, and older unsupported versions, the protections against RFD attacks from CVE-2015-5211 may be bypassed depending on the browser used through the use of a jsessionid path parameter.

Affected Version(s)

Spring Framework 4.3 < 4.3.29

Spring Framework 5.0 < 5.0.19

Spring Framework 5.1 < 5.1.18

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

References

EPSS Score

7% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • ๐ŸŸก

    Public PoC available

  • ๐Ÿ‘พ

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.