#VU23688 Information Exposure Through Timing Discrepancy


Published: 2019-12-19

Vulnerability identifier: #VU23688

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-16782

CWE-ID: CWE-208

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rack
Web applications / Modules and components for CMS

Vendor: Rack

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Rack: 1.2.0 - 2.0.7


CPE

External links
http://github.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38
http://github.com/rack/rack/security/advisories/GHSA-hrqr-hxpp-chr3


Q & A

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.


Latest bulletins with this vulnerability