Published:2015/06/25 Last Updated:2015/06/25
JVN#25336719
namshi/jose fails to verify token signatures
Overview
namshi/jose contains a vulnerability where it fails to verify token signatures.
Products Affected
- namshi/jose 2.2.1 and earlier
- namshi/jose 3.0.0 and earlier
- namshi/jose 4.0.0 and earlier
- namshi/jose 5.0.0 and earlier
Description
namshi/jose is a PHP library for handling JSON Web Tokens (JWT). namshi/jose contains a vulnerability in processing JWT headers where it fails to verify token signatures.
Impact
Specially crafted tokens may be validated as token data with valid signatures.
Solution
Update the Software
Update to the appropriate version according to the information provided by the developer.
Vendor Status
| Vendor | Link |
| Namshi | namshi/jose |
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
Analyzed on 2015.06.25 (CVSS Base Metrics)
| 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) | 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:5.0
Credit
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 Alert |
|
| JPCERT Reports |
|
| CERT Advisory |
|
| CPNI Advisory |
|
| TRnotes |
|
| CVE |
CVE-2015-2964 |
| JVN iPedia |
JVNDB-2015-000090 |