Executive Summary
Informations | |||
---|---|---|---|
Name | CVE-2021-41168 | First vendor Publication | 2021-10-21 |
Vendor | Cve | Last vendor Modification | 2023-07-17 |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | |||
---|---|---|---|
Overall CVSS Score | 6.5 | ||
Base Score | 6.5 | Environmental Score | 6.5 |
impact SubScore | 3.6 | Temporal Score | 6.5 |
Exploitabality Sub Score | 2.8 | ||
Attack Vector | Network | Attack Complexity | Low |
Privileges Required | Low | User Interaction | None |
Scope | Unchanged | Confidentiality Impact | None |
Integrity Impact | None | Availability Impact | High |
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:N/AC:L/Au:S/C:N/I:N/A:P) | |||
---|---|---|---|
Cvss Base Score | 4 | Attack Range | Network |
Cvss Impact Score | 2.9 | Attack Complexity | Low |
Cvss Expoit Score | 8 | Authentication | Requires single instance |
Calculate full CVSS 2.0 Vectors scores |
Detail
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. |
Original Source
Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41168 |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
100 % | CWE-407 | Algorithmic Complexity |
CPE : Common Platform Enumeration
Type | Description | Count |
---|---|---|
Application | 1 |
Sources (Detail)
Source | Url |
---|---|
CONFIRM | https://github.com/reddit/snudown/security/advisories/GHSA-6gvv-9q92-w5f6 |
MISC | https://github.com/reddit/snudown/commit/1ac2c130b210539ee1e5d67a7bac93f9d800... |
Alert History
Date | Informations |
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2023-07-17 21:27:36 |
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2021-10-28 09:22:54 |
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2021-10-22 00:22:52 |
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