#VU66201 Security features bypass in mod_wsgi - CVE-2022-2255

Vulnerability identifier: #VU66201

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-2022-2255

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
mod_wsgi
Operating systems & Components / Operating system package or component

Vendor: Graham Dumpleton

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to mod_wsgi does not correctly remove the X-Client-IP header when processing requests from untrusted proxies. A remote attacker can pass a trusted proxy IP address via the X-Client-IP HTTP header and bypass implemented security restrictions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

mod_wsgi: 4.4.10 - 4.9.2

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External links
https://github.com/GrahamDumpleton/mod_wsgi/commit/af3c0c2736bc0b0b01fa0f0aad3c904b7fa9c751

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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.