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AUSCERT External Security Bulletin Redistribution
ESB-2021.2429
MFSA 2021-31 Multiple Low Security Issues in Mozilla VPN
20 July 2021
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AusCERT Security Bulletin Summary
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Product: Mozilla VPN
Publisher: Mozilla
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Android
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:
https://www.mozilla.org/en-US/security/advisories/mfsa2021-31/
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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
Description
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.
References
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
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