Published:2014/09/25  Last Updated:2014/09/25

jigbrowser+ for iOS same origin policy bypass


jigbrowser+ for iOS provided by co., ltd. contains a flaw that may allow an attacker to bypass the same origin policy.

Products Affected

  • jigbrowser+ for iOS Ver.1.8.1 and earlier


jigbrowser+ for iOS contains a flaw in loading web pages, which may allow an attacker to bypass the same origin policy.


By using JavaScript, an attacker may obtain sensitive data from a different domain in violation of the same origin policy.


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

Vendor Status

Vendor Status Last Update Vendor Notes co., ltd. Vulnerable 2014/09/25 co., ltd. website


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2014.09.25 (CVSS Base Metrics)

What is CVSS?

Measures Severity Description
Access Vector(AV) Local (L) Adjacent Network (A) Network (N) A vulnerability exploitable with network access means the vulnerable software is bound to the network stack and the attacker does not require local network access or local access. Such a vulnerability is often termed "remotely exploitable".
Access Complexity(AC) High (H) Medium (M) Low (L) The access conditions are somewhat specialized.
Authentication(Au) Multiple (M) Single (S) None (N) Authentication is not required to exploit the vulnerability.
Confidentiality Impact(C) None (N) Partial (P) Complete (C) There is considerable informational disclosure. Access to some system files is possible, but the attacker does not have control over what is obtained, or the scope of the loss is constrained.
Integrity Impact(I) None (N) Partial (P) Complete (C) Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.
Availability Impact(A) None (N) Partial (P) Complete (C) There is no impact to the availability of the system.

Base Score:5.8


Toshiharu Sugiyama of DeNA Co., Ltd. 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-2014-5318
JVN iPedia JVNDB-2014-000108