Mozilla Foundation Security Advisory 2008-16

2008-03-26T00:00:00
ID SECURITYVULNS:DOC:19518
Type securityvulns
Reporter Securityvulns
Modified 2008-03-26T00:00:00

Description

Mozilla Foundation Security Advisory 2008-16

Title: HTTP Referrer spoofing with malformed URLs Impact: Moderate Announced: March 25, 2008 Reporter: Gregory Fleischer, RSnake Products: Firefox, SeaMonkey

Fixed in: Firefox 2.0.0.13 SeaMonkey 1.1.9 Description

Security researcher Gregory Fleischer demonstrated a problem with the HTTP Referer: (sic) header sent with requests to URLs containing Basic Authentication credentials with empty usernames. In these cases a number of leading characters, based on the length of the password in the URL, are removed from the referrer hostname. Fleischer pointed out that websites which only check the Referer: header to protect against Cross-Site Request Forgery (CSRF) could be attacked using this flaw. This concept was based on and expanded from a post to the sla.ckers.org forum by security researcher RSnake. References

* Referrer spoofing bug
* CVE-2008-1238
* sla.ckers.org post