Vulnerability identifier: #VU31081
Vulnerability risk: Low
CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-338
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Ratpack
Universal components / Libraries /
Libraries used by multiple products
Vendor: Ratpack
Description
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
Ratpack versions before 1.6.1 generate a session ID using a cryptographically weak PRNG in the JDK's ThreadLocalRandom. This means that if an attacker can determine a small window for the server start time and obtain a session ID value, they can theoretically determine the sequence of session IDs.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Ratpack: 1.6.0
External links
http://github.com/ratpack/ratpack/commit/f2b63eb82dd71194319fd3945f5edf29b8f3a42d
http://github.com/ratpack/ratpack/issues/1448
http://github.com/ratpack/ratpack/releases/tag/v1.6.1
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.