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 PoC๐ŸŸฃ EPSS 63%

What is CVE-2020-5421?

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.

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Deploy the Patch

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.

CVE-2020-5421
Created by pandaMingx

References

https://tanzu.vmware.com/security/cve-2020-5421
x_refsource_CONFIRM
https://lists.apache.org/thread.html/re014a49d77f038ba70e...
mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r1eccdbd7986618a7319...
mailing-listx_refsource_MLIST

EPSS Score

63% 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

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