Published:2015/02/27  Last Updated:2015/02/27

checkpw vulnerable to denial-of-service (DoS)


checkpw contains a denial-of-service (DoS) vulnerability.

Products Affected

  • checkpw-1.02 and earlier


checkpw is a password authentication program. checkpw contains a denial-of-service (DoS) vulnerability due to a flaw in processing account names (CWE-400).


A remote attacker may be able to cause a denial-of-service (DoS).


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

Vendor Status

Vendor Status Last Update Vendor Notes
OHIRA, Shinya Vulnerable 2015/02/27 OHIRA, Shinya website


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2015.02.27 (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) Specialized access conditions or extenuating circumstances do not exist.
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 no impact to the confidentiality of the system.
Integrity Impact(I) None (N) Partial (P) Complete (C) There is no impact to the integrity of the system.
Availability Impact(A) None (N) Partial (P) Complete (C) There is reduced performance or interruptions in resource availability.

Base Score:5.0


Hiroya Ito of GMO Pepabo, Inc. 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-2015-0885
JVN iPedia JVNDB-2015-000032