Published:2013/04/11  Last Updated:2013/04/11

Sleipnir for Windows vulnerable to address bar spoofing


Sleipnir for Windows contains a vulnerability where the address bar may be spoofed.

Products Affected

  • Sleipnir 4 for Windows and earlier


Sleipnir for Windows contains an issue in displaying colors and the padlock icon on the address bar, which may result in the address bar being spoofed.


A user may misinterpret that the website is using the SSL for communications even when the site is not using SSL.


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

Vendor Status

Vendor Link
Fenrir Inc. Sleipnir 4 for Windows


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2013.04.11

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-2013-2303
JVN iPedia JVNDB-2013-000032