This security bulletin contains one medium risk vulnerability.
Exploit availability: NoDescription
The vulnerability allows a remote attacker to perform a hijack victim's session.
The vulnerability exists due to an indexing issue in Rack (RubyGem rack) when processing user sessions. A remote attacker can guess session identifier and hijack victim's session.
Install updates from vendor's website.Vulnerable software versions
Rack: 1.2.0 - 2.0.7
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.