Regular Expression Denial of Service in PostgreSQL Adapter for Active Record
CVE-2021-22880

7.5HIGH

Key Information:

Vendor

Rubyonrails

Status
Https://github.com/rails/rails
Vendor
CVE Published:
11 February 2021

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-22880?

The PostgreSQL adapter in Active Record, prior to specific versions, is susceptible to a regular expression denial of service (REDoS) vulnerability. This issue arises when tailored input leads the input validation mechanism concerning the 'money' type columns in PostgreSQL to consume excessive processing time due to inefficient regular expressions. As a result, this can expose Rails applications to denial of service attacks, particularly when handling user input, emphasizing the importance of updating to secure versions to mitigate risks.

Affected Version(s)

https://github.com/rails/rails Fixed in 6.1.2.1, 6.0.3.5, 5.2.4.5

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-2021-22880
Created by halkichi0308

References

https://hackerone.com/reports/1023899
x_refsource_MISC
https://discuss.rubyonrails.org/t/cve-2021-22880-possible...
x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisoryx_refsource_FEDORA

EPSS Score

5% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.