Advisories

capacitor-updater - End-to-End Encryption Bypass via Private Key Distribution

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severity
high
date
Affecting
  • capacitor-updater >= 0, < 12.128.2

CWE
  • CWE-320 Key Management Errors
CVSS
8.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
Description
In @capgo/capacitor-updater (Cap-go/capgo) before 12.128.2, the end-to-end encryption scheme distributes the private key to each device that downloads the app. Because the public key can be derived from the private key, an attacker performing a man-in-the-middle attack or compromising the Capgo server can create a validly signed update bundle and cause devices to install an update not produced by the original app maker.

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