CVE-2024-3651
Internationalized Domain Names in Applications (IDNA) vulnerable to denial of service from specially crafted inputs to idna.encode
Description
A vulnerability was identified in the kjd/idna library, specifically within the `idna.encode()` function, affecting version 3.6. The issue arises from the function's handling of crafted input strings, which can lead to quadratic complexity and consequently, a denial of service condition. This vulnerability is triggered by a crafted input that causes the `idna.encode()` function to process the input with considerable computational load, significantly increasing the processing time in a quadratic manner relative to the input size.
How to fix CVE-2024-3651
To remediate CVE-2024-3651, upgrade the affected package to a fixed version below.
- —upgrade to 3.7-r0 or later
- —upgrade to 2.10-1+deb11u1 or later
- —upgrade to 2.6-1+deb10u1 or later
- —upgrade to 3.7 or later
- —upgrade to 1d365e17e10d72d0b7876316fc7b9ca0eebdd38d or later
Is CVE-2024-3651 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (5)
- from 0, < 3.7-r0
- from 0, < 2.10-1+deb11u1
- from 0, < 2.6-1+deb10u1
- from 0, < 3.7
- from 0, < 1d365e17e10d72d0b7876316fc7b9ca0eebdd38d | >= 0.1, < 3.7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |