Android 1.6 Donut through 4.2 Jelly Bean does not properly check cryptographic signatures for applications, which allows attackers to execute arbitrary code via an application package file (APK) that is modified in a way that does not violate the cryptographic signature, probably involving multiple entries in a Zip file with the same name in which one entry is validated but the other entry is installed, aka Android security bug 8219321 and the "Master Key" vulnerability
Published Jul 9, 2013
9.3
HIGHCVSS 2.0
EPSS 13.42%
Description
Android 1.6 Donut through 4.2 Jelly Bean does not properly check cryptographic signatures for applications, which allows attackers to execute arbitrary code via an application package file (APK) that is modified in a way that does not violate the cryptographic signature, probably involving multiple entries in a Zip file with the same name in which one entry is validated but the other entry is installed, aka Android security bug 8219321 and the "Master Key" vulnerability.
Affected products
No data.
- 1.6
- 2.0
- 2.0.1
- 2.1
- 2.2
- 2.2
- 2.2.1
- 2.2.2
- 2.2.3
- 2.3
- 2.3
- 2.3.1
- 2.3.2
- 2.3.3
- 2.3.4
- 2.3.5
- 2.3.6
- 2.3.7
- 3.0
- 3.1
- 3.2
- 3.2.1
- 3.2.2
- 3.2.4
- 3.2.6
- 4.0
- 4.0.1
- 4.0.2
- 4.0.3
- 4.0.4
- 4.1
- 4.1.2
- 4.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 13.42% (0.13420) | 96.31th | v5 (v2026.06.15) |
| Jun 25, 2026 | 58.92% (0.58920) | 98.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 62.40% (0.62401) | 99.07th | v5 (v2026.06.15) |
| Jul 20, 2025 | 52.60% (0.52603) | 97.80th | v4 (v2025.03.14) |
| Apr 24, 2025 | 49.22% (0.49219) | 97.59th | v4 (v2025.03.14) |
| Mar 30, 2025 | 51.78% (0.51775) | 97.68th | v4 (v2025.03.14) |
| Mar 29, 2025 | 44.22% (0.44222) | 96.36th | v4 (v2025.03.14) |
| Mar 17, 2025 | 51.78% (0.51775) | 97.64th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.53% (0.00530) | 77.82th | v3 (v2023.03.01) |
| May 24, 2024 | 0.24% (0.00243) | 64.32th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.14% (0.00140) | 48.66th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.12% (0.00118) | 44.53th | v3 (v2023.03.01) |
| Dec 2, 2023 | 0.53% (0.00530) | 74.35th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.47% (0.00466) | 71.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.93% (0.03934) | 85.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.93% (0.03934) | 84.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.93% (0.03934) | 67.70th | v2 (v2022.01.01) |
References (7)
- http://bluebox.com/corporate-blog/bluebox-uncovers-android-master-key/ x_refsource_MISC
- http://review.cyanogenmod.org/#/c/45251/ x_refsource_MISC
- http://www.osvdb.org/94773 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/60952 vdb-entryx_refsource_BID
- http://www.zdnet.com/google-releases-fix-to-oems-for-blue-security-android-security-hole-7000017782/ x_refsource_MISC
- https://jira.cyanogenmod.org/browse/CYAN-1602 x_refsource_MISC
- https://plus.google.com/113331808607528811927/posts/GxDA6111vYy x_refsource_MISC
| Link | Providers | Tags |
|---|---|---|
| http://bluebox.com/corporate-blog/bluebox-uncovers-android-master-key/ | x_refsource_MISC | |
| http://review.cyanogenmod.org/#/c/45251/ | x_refsource_MISC | |
| http://www.osvdb.org/94773 | vdb-entryx_refsource_OSVDB | |
| http://www.securityfocus.com/bid/60952 | vdb-entryx_refsource_BID | |
| http://www.zdnet.com/google-releases-fix-to-oems-for-blue-security-android-security-hole-7000017782/ | x_refsource_MISC | |
| https://jira.cyanogenmod.org/browse/CYAN-1602 | x_refsource_MISC | |
| https://plus.google.com/113331808607528811927/posts/GxDA6111vYy | x_refsource_MISC |
Change history (0)
No recorded changes yet.