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CVE-2023-36456— Authentik lacks Proxy IP headers validation

Quick assessment

Affected
goauthentik authentik
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

authentik是authentik开源的一个开源身份提供应用程序。 authentik 2023.4.3版本、2023.5.5版本存在安全漏洞，该漏洞源于不会验证 Python 代码和 go 中的 X-Forwarded-For 和 X-Real-IP 标头的来源。

CVSS 8.3 · High EPSS 0.79% · P55

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-36456

Vulnerability Information
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Vulnerability Title
Authentik lacks Proxy IP headers validation
Source: CVE Program / CVE List V5
Vulnerability Description
authentik is an open-source Identity Provider. Prior to versions 2023.4.3 and 2023.5.5, authentik does not verify the source of the X-Forwarded-For and X-Real-IP headers, both in the Python code and the go code. Only authentik setups that are directly accessible by users without a reverse proxy are susceptible to this. Possible spoofing of IP addresses in logs, downstream applications proxied by (built in) outpost, IP bypassing in custom flows if used. This poses a possible security risk when someone has flows or policies that check the user's IP address, e.g. when they want to ignore the user's 2 factor authentication when the user is connected to the company network. A second security risk is that the IP addresses in the logfiles and user sessions are not reliable anymore. Anybody can spoof this address and one cannot verify that the user has logged in from the IP address that is in their account's log. A third risk is that this header is passed on to the proxied application behind an outpost. The application may do any kind of verification, logging, blocking or rate limiting based on the IP address, and this IP address can be overridden by anybody that want to. Versions 2023.4.3 and 2023.5.5 contain a patch for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
解释冲突
Source: CVE Program / CVE List V5
Vulnerability Title
authentik 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
authentik是authentik开源的一个开源身份提供应用程序。 authentik 2023.4.3版本、2023.5.5版本存在安全漏洞，该漏洞源于不会验证 Python 代码和 go 中的 X-Forwarded-For 和 X-Real-IP 标头的来源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
goauthentik authentik < 2023.4.3 -

II. Public POCs for CVE-2023-36456

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III. Intelligence Information for CVE-2023-36456

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Patches & Fixes for CVE-2023-36456 (2)

Vendor Advisories for CVE-2023-36456 (1)

Other References for CVE-2023-36456 (2)

IV. Related Vulnerabilities

Same product: authentik
Same vendor: goauthentik
Same weakness: CWE-436

V. Comments for CVE-2023-36456

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