Published:2012/07/30  Last Updated:2012/08/02

Yahoo! Toolbar (for Chrome, Safari) vulnerable to toolbar alteration


Yahoo! Toolbar (for Chrome, Safari) contains a vulnerability where the toolbar may be altered.

Products Affected

  • Yahoo! Toolbar for Chrome Ver. and earlier
  • Yahoo! Toolbar for Safari Ver. and earlier
Note that Yahoo! Toolbar for Internet Explorer and Firefox are not affected by this vulnerability.


Yahoo! Toolbar (for Chrome, Safari) contains a vulnerability where the toolbar may be altered when visiting a specially crafted web page.


A remote attacker may alter the toolbar. As a result, keywords entered in the toolbar may be leaked to a third party.


Update the software
Update to the latest version according to the information provided by the developer.

According to the developer, Yahoo! Toolbar for Chrome updates automatically.

Vendor Status

Vendor Link
Yahoo! Yahoo! Toolbar


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2012.07.30

Measures Conditions Severity
Access Required can be attacked over the Internet using packets
  • High
Authentication anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required the user must be convinced to take a standard action that does not feel harmful to most users, such as click on a link or view a file
  • Mid
Exploit Complexity some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)
  • Mid-High

Description of each analysis measures


Keita Haga of reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2012-2647
JVN iPedia JVNDB-2012-000072

Update History

Information was updated to reflect the versions affected more clearly.