#VU88828 Resource exhaustion in idna - CVE-2024-3651

Vulnerability identifier: #VU88828

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-3651

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
idna
Other software / Other software solutions

Vendor: kjd (Kim Davies)

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources within the idna.encode() function. A remote attacker can pass an overly long domain name to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

idna: 3.0 - 3.6

---

External links
https://github.com/advisories/GHSA-jjg7-2v4v-x38h

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.