Last modified: 2012-04-12 13:54:24 UTC

Wikimedia Bugzilla is closed!

Wikimedia migrated from Bugzilla to Phabricator. Bug reports are handled in Wikimedia Phabricator.
This static website is read-only and for historical purposes. It is not possible to log in and except for displaying bug reports and their history, links might be broken. See T30450, the corresponding Phabricator task for complete and up-to-date bug report information.
First Last Prev Next    This bug is not in your last search results.
Bug 28450 - Backslash-escaped comments allow CSS injection vulnerability
Backslash-escaped comments allow CSS injection vulnerability
Status: RESOLVED FIXED
Product: MediaWiki
Classification: Unclassified
Parser (Other open bugs)
1.16.x
All All
: Normal normal (vote)
: ---
Assigned To: Nobody - You can work on this!
:
Depends on:
Blocks:
  Show dependency tree / graph
 
Reported: 2011-04-07 04:33 UTC by Tim Starling
Modified: 2012-04-12 13:54 UTC (History)
3 users (show)

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---

Attachments
Add an attachment (proposed patch, testcase, etc.)

Description Tim Starling 2011-04-07 04:33:00 UTC 
Wikipedia user Suffusion of Yellow discovered a CSS injection vulnerability, which occurs when CSS comments /* ... */ are escaped with backslashes: \2f\2a ... \2a\2f. The bug is due to an error in the CSS escape sequence normalisation code which we introduced to fix bug 23687.

As with any CSS injection vulnerability, the impact is complete account compromise (XSS) for Internet Explorer users, and possible privacy loss due to arbitrary remote image embedding for users of other browsers.
Comment 1 Platonides 2011-04-12 21:34:04 UTC 
Was fixed in r85856
Comment 2 Antoine "hashar" Musso (WMF) 2011-10-24 08:40:28 UTC 
Basic test added with r100584
Note You need to log in before you can comment on or make changes to this bug.
First Last Prev Next    This bug is not in your last search results.

Navigation
Links