{"id":"CVE-2013-4787","url":"https://www.cyber-defence.io/tools/cve/CVE-2013-4787","generatedAt":"2026-11-05T07:28:48.550Z","title":"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…","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.","published":"2013-07-09T17:55:01.000Z","lastModified":"2026-06-16T23:57:54.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":9.3,"severity":"HIGH","vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C"},"cwe":["CWE-310"],"affected":["google/android"],"epss":{"score":0.13527,"percentile":0.96465,"date":"2026-11-04","history":[{"date":"2026-09-24","score":0.1342,"percentile":0.96287}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2013-07-03","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":38627,"kind":"exploit","title":"Google Android - 'APK' code Remote Security Bypass","url":"https://www.exploit-db.com/exploits/38627","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/android/remote/38627.sh","file":"exploits/android/remote/38627.sh","published":"2013-07-03","added":"2013-07-03","updated":"2017-11-16","author":"Bluebox Security","type":"remote","platform":"android","port":null,"verified":true,"codes":["CVE-2013-4787","OSVDB-94773"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.securityfocus.com/bid/60952/info"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 13.5%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-24T00:00:00.000Z","detail":{"to":0.1342,"from":0.5892,"percentile":0.96287},"summary":"EPSS moved from 58.9% to 13.4% probability of exploitation in the next thirty days."}],"references":[{"url":"http://bluebox.com/corporate-blog/bluebox-uncovers-android-master-key/","source":"cve@mitre.org"},{"url":"http://review.cyanogenmod.org/#/c/45251/","source":"cve@mitre.org"},{"url":"http://www.osvdb.org/94773","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/60952","source":"cve@mitre.org"},{"url":"http://www.zdnet.com/google-releases-fix-to-oems-for-blue-security-android-security-hole-7000017782/","source":"cve@mitre.org"},{"url":"https://jira.cyanogenmod.org/browse/CYAN-1602","source":"cve@mitre.org"},{"url":"https://plus.google.com/113331808607528811927/posts/GxDA6111vYy","source":"cve@mitre.org"},{"url":"http://bluebox.com/corporate-blog/bluebox-uncovers-android-master-key/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://review.cyanogenmod.org/#/c/45251/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.osvdb.org/94773","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/60952","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.zdnet.com/google-releases-fix-to-oems-for-blue-security-android-security-hole-7000017782/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://jira.cyanogenmod.org/browse/CYAN-1602","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://plus.google.com/113331808607528811927/posts/GxDA6111vYy","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2013-4787","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}