| Title: | Cross Site Request Forgery in Yahoo! 360plus |
|---|---|
| Severity: | Moderate |
| Reporter: | Thinh Q. Hoang and Blue Moon Consulting |
| Products: | Yahoo! 360plus |
| Fixed in: | -- |
We could not find out the definitive description for Yahoo! 360plus from Yahoo! website. This is our own understanding of the application: Yahoo! 360plus is a blogging service.
We have discovered a Cross Site Request Forgery vulnerability in Yahoo! 360plus. The attacker could force an unknowning user to remove all her avatars by visiting a specially crafted page while her Yahoo! 360plus session is still valid.
This problem is similar to the one that allowed removal of user comments in Yahoo! 360 (the older version of Yahoo! 360plus). The link to avatar deletion is, in the case of Yahoo! 360plus Vietnam, http://vn.blog.yahoo.com/setup/profile_photo.php?act=del&prf_photo=1 where prf_photo could be 1, 2, 3, or 4. Unlike other actions where a crumb token is required, this action does not require any token and hence suffers from a CSRF vulnerability.
Users of Yahoo! 360plus service should only login to make modifications and logout immediately when done.
There is no fix at the moment.
Blue Moon Consulting adapts RFPolicy v2.0 in notifying vendors.
| Initial vendor contact: | |
|---|---|
| June 02, 2009: Initial security alert sent to security@yahoo-inc.com | |
| Vendor response: | |
| -- | |
| Further communication: | |
| -- | |
| Public disclosure: | |
| June 10, 2009 | |
| Exploit code: | No exploit code required. |
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