CVE-2021-41168

Katalog CVE

CVSS 6.5 · Medium EPSS 0,79%

Kerentanan Improper Input Validation pada reddit snudown. Skor CVSS 3.1 6.5 (Medium) menurut NVD.

Deskripsi (NVD)

Snudown is a reddit-specific fork of the Sundown Markdown parser used by GitHub, with Python integration added. In affected versions snudown was found to be vulnerable to denial of service attacks to its reference table implementation. References written in markdown ` [reference_name]: https://www.example.com` are inserted into a hash table which was found to have a weak hash function, meaning that an attacker can reliably generate a large number of collisions for it. This makes the hash table vulnerable to a hash-collision DoS attack, a type of algorithmic complexity attack. Further the hash table allowed for duplicate entries resulting in long retrieval times. Proofs of concept and further discussion of the hash collision issue are discussed on the snudown GHSA(https://github.com/reddit/snudown/security/advisories/GHSA-6gvv-9q92-w5f6). Users are advised to update to version 1.7.0.

Rincian

Terbit di NVD

21 Oktober 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

6.5 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation
CWE-327: Use of a Broken or Risky Cryptographic Algorithm
CWE-400: Uncontrolled Resource Consumption
CWE-407: Inefficient Algorithmic Complexity

EPSS (30 hari)

0,79% peluang dieksploitasi; lebih tinggi dari 55,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/reddit/snudown/commit/1ac2c130b210539ee1e5d67a7bac93f9d8007c0e patch · advisory pihak ketiga
• https://github.com/reddit/snudown/security/advisories/GHSA-6gvv-9q92-w5f6 exploit · advisory pihak ketiga