Vulnerability CVE-2021-41171
Published: 2021-10-22

Description:
eLabFTW is an open source electronic lab notebook manager for research teams. In versions of eLabFTW before 4.1.0, it allows attackers to bypass a brute-force protection mechanism by using many different forged PHPSESSID values in HTTP Cookie header. This issue has been addressed by implementing brute force login protection, as recommended by Owasp with Device Cookies. This mechanism will not impact users and will effectively thwart any brute-force attempts at guessing passwords. The only correct way to address this is to upgrade to version 4.1.0. Adding rate limitation upstream of the eLabFTW service is of course a valid option, with or without upgrading.

Type:

CWE-307

 (Improper Restriction of Excessive Authentication Attempts)

CVSS2 => (AV:N/AC:L/Au:S/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4/10
2.9/10
8/10
Exploit range
Attack complexity
Authentication
Remote
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Elabftw -> Elabftw 

 References:
https://github.com/elabftw/elabftw/security/advisories/GHSA-q67h-5pc3-g6jv
https://github.com/elabftw/elabftw/releases/tag/4.1.0
https://www.exploit-db.com/docs/50436
https://owasp.org/www-community/Slow_Down_Online_Guessing_Attacks_with_Device_Cookies
https://github.com/elabftw/elabftw/commit/8e92afeec4c3a68dc88333881b7e6307f425706b
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