CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2024-3651
High (7.5) in kjd internationalized domain names in applications. EPSS 1.4% chance of exploitation in the next 30 days. Fixed in idna 3.7.
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.
Severity
- EPSS
- 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
- CWE
- CWE-1333
- Published
- Modified
- Record from
- the NVD, synced
Affected
- kjd:internationalized_domain_names_in_applications
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-jjg7-2v4v-x38h | PyPI | idna | <3.7 | 3.7 |
| PYSEC-2024-60 | PyPI | idna | >=0.1 <3.7 | 3.7 |
References
- https://github.com/kjd/idna/commit/1d365e17e10d72d0b7876316fc7b9ca0eebdd38d
- https://huntr.com/bounties/93d78d07-d791-4b39-a845-cbfabc44aadb
- https://github.com/kjd/idna/commit/1d365e17e10d72d0b7876316fc7b9ca0eebdd38d
- https://huntr.com/bounties/93d78d07-d791-4b39-a845-cbfabc44aadb
- https://lists.debian.org/debian-lts-announce/2024/05/msg00006.html