Published:2018/12/10  Last Updated:2018/12/10

JVN#25385698
Cybozu Garoon access restriction bypass vulnerability

Overview

Cybozu Garoon contains an access restriction bypass vulnerability.

Products Affected

  • Cybozu Garoon 3.0.0 to 4.10.0

Description

Single sign-on function of Cybozu Garoon provided by Cybozu, Inc. contains a restriction bypass vulnerability (CWE-284).

Impact

An attacker who can access the product may bypass authentication of Single sign-on function and view the information which is available only for sign-on users.

Solution

Apply the Patch
Apply the patch according to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
Cybozu, Inc. Vulnerable 2018/12/10 Cybozu, Inc. website

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

CVSS v3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score: 7.5
Attack Vector(AV) Physical (P) Local (L) Adjacent (A) Network (N)
Attack Complexity(AC) High (H) Low (L)
Privileges Required(PR) High (H) Low (L) None (N)
User Interaction(UI) Required (R) None (N)
Scope(S) Unchanged (U) Changed (C)
Confidentiality Impact(C) None (N) Low (L) High (H)
Integrity Impact(I) None (N) Low (L) High (H)
Availability Impact(A) None (N) Low (L) High (H)
CVSS v2 AV:N/AC:L/Au:N/C:P/I:N/A:N
Base Score: 5.0
Access Vector(AV) Local (L) Adjacent Network (A) Network (N)
Access Complexity(AC) High (H) Medium (M) Low (L)
Authentication(Au) Multiple (M) Single (S) None (N)
Confidentiality Impact(C) None (N) Partial (P) Complete (C)
Integrity Impact(I) None (N) Partial (P) Complete (C)
Availability Impact(A) None (N) Partial (P) Complete (C)

Credit

Kanta Nishitani reported this vulnerability to Cybozu, Inc., and Cybozu, Inc. reported this vulnerability to JPCERT/CC to notify users of its solution through JVN. JPCERT/CC and Cybozu, Inc. coordinated under the Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2018-16178
JVN iPedia JVNDB-2018-000130