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GHSA-jr54-jwhj-55gp
No affected components available
Summary
Sign-in response timing differed between known and unknown email addresses because the unknown-user branch returned without performing a password hash comparison.
Details
The unknown-user branch in auth.service.ts now performs a bcrypt.compare against
a fixed dummy hash so the response time of failed sign-ins is approximately
independent of whether the address exists. Rate limiting on the sign-in endpoint is
implemented in the Enterprise build only and is not affected by this advisory.
Impact
A network-positioned attacker could enumerate registered email addresses by timing sign-in responses. Exploitation requires only the ability to send unauthenticated sign-in requests.
Credit
This issue was reported by @AndyAnh174.
The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
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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