CVE-2018-1000620
Insufficient Entropy vulnerability in cryptiles (npm)
What is CVE-2018-1000620 About?
This vulnerability in `cryptiles` versions prior to 4.1.2 results from insufficient entropy in its `randomDigits()` method. The generated digits are not evenly distributed, making them predictable. This weakness can undermine security features relying on randomness, and exploitation can be relatively easy if the random number generation is critical.
Affected Software
Technical Details
The vulnerability found in cryptiles library versions prior to 4.1.2 is due to a flaw in the randomDigits() method. This method is intended to generate random numerical strings. However, its implementation exhibits 'insufficient entropy,' meaning the randomness source or generation algorithm is weak. Specifically, the generated digits are not evenly distributed, which implies a bias in the output. This non-uniform distribution makes the sequence of 'random' digits more predictable than it should be. If this method is used for critical security operations such as generating session tokens, cryptographic keys, password reset tokens, or other security-sensitive random values, an attacker could potentially guess or predict these values with a higher probability than brute-forcing truly random data, thereby compromising the security mechanism.
What is the Impact of CVE-2018-1000620?
Successful exploitation may allow attackers to predict randomly generated values, leading to compromise of sensitive data, session hijacking, or bypass of security mechanisms dependent on cryptographic randomness.
What is the Exploitability of CVE-2018-1000620?
Exploitation depends on how the randomDigits() method from cryptiles is used within an application. If it's used for security-critical functions like generating session IDs, temporary tokens, or cryptographic keys, the impact could be significant. The attacker would need to understand the statistical bias of the generated numbers. The attack is generally remote, but relies on a weakness in the generation, not direct interaction with a vulnerable component in real-time. No specific authentication or privilege is required, as the vulnerability lies in the output predictability. The complexity varies; identifying the use of the vulnerable randomDigits() method and then leveraging its statistical weakness can range from moderate to high depending on the security feature involved. The core risk factor is any security feature that relies on this method for its randomness.
What are the Known Public Exploits?
| PoC Author | Link | Commentary |
|---|---|---|
| No known exploits | ||
What are the Available Fixes for CVE-2018-1000620?
Available Upgrade Options
- cryptiles
- >3.1.0, <4.1.2 → Upgrade to 4.1.2
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Book a demoAdditional Resources
- https://github.com/hapijs/cryptiles/issues/35
- https://github.com/hapijs/cryptiles/issues/34
- https://github.com/advisories/GHSA-rq8g-5pc5-wrhr
- https://github.com/hapijs/cryptiles/commit/6bdcd0f6ee8ade96e7b30350bad39ee0c2ef0f9b
- https://osv.dev/vulnerability/GHSA-rq8g-5pc5-wrhr
- https://github.com/hapijs/cryptiles/issues/34
- https://www.npmjs.com/advisories/1464
- https://github.com/hapijs/cryptiles/commit/9332d4263a32b84e76bf538d7470d01ea63fa047
- https://github.com/hapijs/cryptiles/issues/35
- https://www.npmjs.com/advisories/720
What are Similar Vulnerabilities to CVE-2018-1000620?
Similar Vulnerabilities: CVE-2011-2483 , CVE-2015-0205 , CVE-2016-10705 , CVE-2020-28241 , CVE-2023-28822
