JVN#65273415
Android OS issue where it is affected by the CRIME attack
Overview
The implementation of the TLS protocol in Android OS contains a vulnerability where plaintext HTTP headers may be obtained.
Products Affected
- Android OS versions 4.1.2 and earlier
Description
The TLS protocol contains a function that compresses data for communications between the client and server. This function does not properly obfuscate the length of the unencrypted data. When this function is enabled on both the client and server, it results in a vulnerability where plaintext HTTP headers may be obtained. The TLS implementation in Android OS is affected by this vulnerability.
Exploiting this vulnerability to obtain plaintext HTTP headers is referred to as the CRIME attack.
Impact
A man-in-the-middle attacker performing the CRIME attack may obtain plaintext HTTP headers.
Solution
Apply an update
Apply the update according to the information provided by the provider or developer.
Vendor Status
| Vendor | Status | Last Update | Vendor Notes |
|---|---|---|---|
| Cybozu, Inc. | Not Vulnerable | 2016/07/22 | |
| Disney Mobile on SoftBank | Vulnerable, investigating | 2016/07/22 | |
| FUJITSU LIMITED | Not Vulnerable | 2016/07/22 | |
| KDDI CORPORATION | Vulnerable, investigating | 2016/07/26 | |
| Sharp Corporation | Not Vulnerable | 2016/07/22 | |
| SoftBank | Vulnerable, investigating | 2016/07/22 | |
| Y!mobile | Vulnerable, investigating | 2016/07/22 |
| Vendor | Link |
| Google, Inc. | Change I0efabd6b: Disable SSL compression |
| Change I8e060a82: Disable SSL compression |
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
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 |
CVE-2012-4929 |
| JVN iPedia |
JVNDB-2016-000129 |
Update History
- 2016/07/22
- KDDI CORPORATION update status
- 2016/07/25
- KDDI CORPORATION update status
- 2016/07/26
- KDDI CORPORATION update status