Bugtraq mailing list archives
Cross-site Scripting with Local Privilege Vulnerability in Yahoo Messenger
From: hainamluke () yahoo com
Date: 26 Jan 2007 15:26:34 -0000
DESCRIPTION: Ive found a cross-site scripting vulnerability in Yahoo! Messenger, a popular advertisement-supported instant messaging client and protocol provided by Yahoo! Attacker can inject a malicious script with local privilege to Y!M notification message. The vulnerability is discovered in the chat dialog. The automatic notification message of Yahoo! Messenger, for instance Hai Nam Luke has signed out. (1/26/2007 10:03 PM) or Hai Nam Luke has signed back in. (1/26/2007 10:04 PM) can be easily exploited with injecting a malicious script to. Script is disabled in chat messages but system notification messasage. That Yahoo Messenger uses Internet Explorer to display messages, the malicious script will be run with local privilege in the Internet Explorer Temporary Folder. This serious vulnerability could allow attacker gain the victims system access. Inject unexpected script also causes other Yahoo! Messengers errors. AFFECTED VERSION: Yahoo! Messenger 8.1.0.29 and previous versions PROOF OF CONCEPT: + Firstname: Hai Nam Luke Hai Nam Luke Hai Nam Luke Hai Nam Luke ( as long as victim cant see the lastname) + Lastname: <img src="javascript:alert('Executed from ' + top.location)" > + Request to add victim ID to your contact list. + Once victim accepts your request, send him a message and change your online status (Available -> Invisible) This vulnerability was reported to Yahoo! Hai Nam Luke <hainamluke () yahoo com> K46A - NEU
Current thread:
- Cross-site Scripting with Local Privilege Vulnerability in Yahoo Messenger hainamluke (Jan 26)
- RE: Cross-site Scripting with Local Privilege Vulnerability in Yahoo Messenger Ahmed Sheipani (Jan 27)
- Re: Cross-site Scripting with Local Privilege Vulnerability in Yahoo Messenger 3B.Security Researcher (Jan 29)
- <Possible follow-ups>
- Re: Cross-site Scripting with Local Privilege Vulnerability in Yahoo Messenger Outlaw (Jan 27)
- RE: Cross-site Scripting with Local Privilege Vulnerability in Yahoo Messenger Ahmed Sheipani (Jan 27)