Android Flaw Lets Hackers Inject Malware Into Apps Without Altering Signatures

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December 08, 2017

Millions of Android devices are at serious risk of a newly disclosed critical vulnerability that allows attackers to secretly overwrite legitimate applications installed on your smartphone with their malicious versions.

Dubbed Janus, the vulnerability allows attackers to modify the code of Android apps without affecting their signature verification certificates, eventually allowing them to distribute malicious update for the legitimate apps, which looks and works same as the original apps.

The vulnerability (CVE-2017-13156) was discovered and reported to Google by security researchers from mobile security firm GuardSquare this summer and has been patched by Google, among four dozen vulnerabilities, as part of its December Android Security Bulletin.

However, the worrisome part is that majority of Android users would not receive these patches for next few month, until their device manufacturers (OEMs) release custom updates for them, apparently leaving a large number of smartphone users vulnerable to hackers.

The vulnerability affects apps using APK signature scheme v1 installed on devices running Android versions 5 (Lollipop) and 6 (Marshmallow).

MORE: https://thehackernews.com/2017/12/android-malware-signature.html?m=1

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