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             AUSCERT External Security Bulletin Redistribution

         MFSA 2021-31 Multiple Low Security Issues in Mozilla VPN
                               20 July 2021


        AusCERT Security Bulletin Summary

Product:           Mozilla VPN
Publisher:         Mozilla
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
                   Apple iOS
Impact/Access:     Denial of Service        -- Unknown/Unspecified
                   Access Confidential Data -- Unknown/Unspecified
                   Reduced Security         -- Unknown/Unspecified
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-29978  

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

Mozilla Foundation Security Advisory 2021-31

Multiple Low Security Issues in Mozilla VPN

Announced: July 14, 2021
Impact:    low
Products:  Mozilla VPN
Fixed in:  Mozilla VPN 2.3

Multiple low security issues were discovered in a security audit of Mozilla VPN
2.0 branch

# CVE-2021-29978: Multiple low security issues were discovered in a security
audit of Mozilla VPN 2.0 branch

Reporter: Cure53
Impact:   low


Multiple low security issues were discovered and fixed in a security audit of
Mozilla VPN 2.x branch as part of a 3rd party security audit.


  o Balrog did not verify certificate chain on macOS
  o Balrog incorrectly verified certificate chain
  o ATS policy unnecessarily weakened
  o Authenticationlistener allowed disturbance of login
  o Race condition in Ping Sender could expose gateway IP
  o Android app allowed backups of application data
  o Secure flag missing on views for Android app
  o Android app supported insecure v1 signature
  o Information disclosure via device endpoint
  o Unencrypted shared preferences
  o Android app exposes sensitive data to system logs
  o Cross-site WebSocket hijacking
  o Auth code could be leaked by injecting port
  o Authentication listener allows disturbance of login

- --------------------------END INCLUDED TEXT--------------------

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