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GHSA-376v-xgjx-7mfr
No affected components available
Impact
fastify-bearer-auth does not securely use crypto.timingSafeEqual. A malicious attacker could estimate the length of one valid bearer token. According to the corresponding RFC 6750, the bearer token has only base64 valid characters, reducing the range of characters for a brute force attack.
All versions of fastify-bearer-auth are also affected.
Patches
We released:
- v8.0.1 with a fix for the Fastify v4 line
- v7.0.2 with a fix for the Fastify v3 line
Workarounds
There are no workarounds. Update your dependencies.
References
https://hackerone.com/reports/1633287
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/fastify/fastify-bearer-auth
- Email us at hello@matteocollina.com
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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