#auth

## Impact There is a potential vulnerability in Traefik managing the ACME HTTP challenge. When Traefik is configured to use the [HTTPChallenge](https://doc.traefik.io/traefik/https/acme/#httpchallenge) to generate and renew the Let's Encrypt TLS certificates, the delay authorized to solve the challenge (50 seconds) can be exploited by attackers ([slowloris attack](https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris/)). ## Patches - https://github.com/traefik/traefik/releases/tag/v2.10.6 - https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5 ## Workarounds Replace the HTTPChallenge with the [TLSChallenge](https://doc.traefik.io/traefik/https/acme/#tlschallenge) or the [DNSChallenge](https://doc.traefik.io/traefik/https/acme/#dnschallenge). ## For more information If you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).

### Summary When a request is sent to Traefik with a URL fragment, Traefik automatically URL encodes and forwards the fragment to the backend server. This violates the RFC because in the origin-form the URL should only contain the absolute path and the query. When this is combined with another frontend proxy like Nginx, it can be used to bypass frontend proxy URI-based access control restrictions. ### Details For example, we have this Nginx configuration: ``` location /admin { deny all; return 403; } ``` This can be bypassed when the attacker is requesting to /#/../admin This won’t be vulnerable if the backend server follows the RFC and ignores any characters after the fragment. However, if Nginx is chained with another reverse proxy which automatically URL encode the character # (Traefik) the URL will become /%23/../admin And allow the attacker to completely bypass the Access Restriction from the Nginx Front-End proxy. Here is a diagram to summarize the attack: ![i...

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By Deeba Ahmed Walmart customers have become the prime target of this phishing scam. This is a post from HackRead.com Read the original post: USPS Delivery Phishing Scam Exploits SaaS Providers to Steal Data

View CSAF 1. EXECUTIVE SUMMARY CVSS v3 5.4 ATTENTION: Exploitable with adjacent access/low attack complexity Vendor: Zebra Technologies Equipment: ZTC Industrial ZT410, ZTC Desktop GK420d Vulnerability: Authentication Bypass Using an Alternate Path or Channel 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to send specially crafted packets to change credentials without any prior authentication. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Zebra ZTC industrial and desktop printers are affected: ZTC Industrial ZT410: All versions ZTC Desktop GK420d: All versions 3.2 Vulnerability Overview 3.2.1 Authentication Bypass Using an Alternate Path or Channel CWE-288 A vulnerability of authentication bypass has been found in Zebra Technologies ZTC Industrial ZT410 and ZTC Desktop GK420d. This vulnerability allows an attacker that is in the same network as the printer to change the username and password for the web page by sending a ...