Kjd/Idna Library Vulnerability Affects Version 3.6, Leading to Denial of Service
CVE-2024-3651

7.5HIGH

Key Information:

Vendor

Kjd

Status
Kjd/idna
Vendor
CVE Published:
7 July 2024

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2024-3651?

A vulnerability has been identified in the kjd/idna library, particularly affecting the functionality of the idna.encode() method in version 3.6. This problem stems from the method's inadequate handling of specially crafted input strings, which can lead to significant computational overhead. When triggered, this can cause the function to exhibit quadratic complexity in processing, resulting in a potential denial of service scenario. The vulnerability allows an attacker to provide maliciously designed input that substantially prolongs the processing time, thereby exploiting the system's resources.

Affected Version(s)

kjd/idna < 3.7

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-2024-3651-exploit
Created by redhat-tssc-tmm

References

https://huntr.com/bounties/93d78d07-d791-4b39-a845-cbfabc...
https://github.com/kjd/idna/commit/1d365e17e10d72d0b78763...

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

CVSS V3.0

Score:
6.2
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.