Published:2012/04/26  Last Updated:2012/04/26

sp mode mail issue in the verification of SSL certificates


sp mode mail contains an issue in the verification of the SSL server certificate.

Products Affected

  • sp mode mail version 5400 and earlier

According to the developer, only sp mode mail applications for Android are affected.


sp mode mail provided by NTT DOCOMO contains an issue in the verification of the SSL server certificate.


Since no warning is issued when connecting to a server that is using an invalid SSL server certificate, a remote attacker may be able to intercept communications.


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


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2012.04.26

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 vulnerability can be exploited without an honest user taking any action
  • High
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


Tsukasa Hamano of Open Source Solution Technology Corporation 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-2012-1244
JVN iPedia JVNDB-2012-000037