#VU23688 Information Exposure Through Timing Discrepancy in Rack - CVE-2019-16782
Vulnerability identifier: #VU23688
Vulnerability risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
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, 1.6 - 1.6.11, 2.0 - 2.0.7
External links
https://github.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38
https://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.
