X41 D-Sec GmbH Security Advisory: X41-2020-003
Highest Severity Rating: Critical
Confirmed Affected Versions: 184.108.40.206
Confirmed Patched Versions: 20.1.1
Vendor: Epikur Software & IT Services GmbH
Vendor URL: https://www.epikur.de/
Credit: X41 D-Sec GmbH, Eric Sesterhenn
Several flaws regarding authentication have been identified in Epikur, which allow attackers to access sensitive information. Among the issues identified is a backdoor password, weak password hashes and hardcoded credentials.
Epikur allows you to manage a medical office and patients.
Severity Rating: Critical
CVSS Score: 10.0
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
The Epikur server contains the
checkPasswort() function that, upon user
login, checks the submitted password against the user password’s MD5 hash
stored in the database. It is also compared to a second MD5 hash, which is the
same for every user. If the submitted password matches either one, access is
Brute-forcing the second hash reveals that the password
allow you to login as any user.
Severity Rating: Medium
Vector: Database Access
CVSS Score: 6.0
CVSS Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Epikur stores the secret passwords of the users as an MD5 hash in the database. MD5 can be brute-forced efficiently and should not be used for such purposes. Additionally, since no salt is used, rainbow tables can speed up the attack.
Severity Rating: Medium
Vector: Local Network Interface
CVSS Score: 6.8
CVSS Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
A Glassfish 4.1 server with default configuration is running on TCP port 4848. No password is required to access it with the administrator account.
2020-02-17 Issue found
2020-02-27 Asked vendor for security contact
2020-02-27 Vendor reply after just 3 hours, will setup encrypted communication channel
2020-02-28 Information sent to vendor
2020-03-10 Vendor acknoledges issues
2020-03-13 CVE IDs assigned
2020-04-01 Updated version and advisory released
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