JVN#20786316
Cryptography API: Next Generation (CNG) vulnerable to denial-of-service (DoS)
Overview
Cryptography API: Next Generation (CNG) contains a denial-of-service (DoS) vulnerability.
Products Affected
- Cryptography API: Next Generation (CNG) in Windows 7 and earlier
Description
Cryptography API: Next Generation (CNG) contains an issue in BCryptDecrypt, which may result in a denial-of-service (DoS).
Impact
If CNG processes a specially crafted key data, the product may be terminated abnormally.
Solution
Upgrade Windows
According to the developer, CNG included in Windows 8 and later is not affected by this vulnerability.
Upgrade Windows to 8.1 or later.
The developer states the comment below:
The impact of this issue is limited. It could only result in a localized Denial of Service condition, at worst. This could not be exploited or code executed remotely.
The issue does not exist in Windows 8 and above. We recommend that customers upgrade their system to the supported version of Windows 8.1 or above.
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
| 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) |
| 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
ASHINO, Yuki of NEC Corporation reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information
| JPCERT Alert |
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| JPCERT Reports |
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| CERT Advisory |
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| CPNI Advisory |
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| TRnotes |
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| CVE |
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| JVN iPedia |
JVNDB-2016-000195 |