#VU64503 Information disclosure in actionpack - CVE-2022-23633

Vulnerability identifier: #VU64503

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-23633

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

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

Vendor: Ruby

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists in the Rack middleware package of RubyGems, where response bodies will not close under certain circumstances. A remote attacker can iterate requests to force ActionDispatch::Executor to not close, allowing subsequent requests to leak data from ActiveSupport::CurrentAttributes.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

actionpack: 5.0.0.racecar1 - 5.0.7.2, 5.1.0 rc1 - 5.1.7, 5.2.0 rc1 - 5.2.6.1, 6.0.0 rc1 - 6.0.4.5, 6.1.0 rc1 - 6.1.4.5, 7.0.0 alpha1 - 7.0.2.1

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External links
https://github.com/rails/rails/commit/f9a2ad03943d5c2ba54e1d45f155442b519c75da
https://github.com/rails/rails/security/advisories/GHSA-wh98-p28r-vrc9
https://www.openwall.com/lists/oss-security/2022/02/11/5
https://bugzilla.redhat.com/show_bug.cgi?id=2063149

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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.