CVE-2021-41093: Account takeover when having only access to a user's short lived token
First published: Mon Oct 04 2021(Updated: )
Wire is an open source secure messenger. In affected versions if the an attacker gets an old but valid access token they can take over an account by changing the email. This issue has been resolved in version 3.86 which uses a new endpoint which additionally requires an authentication cookie. See wire-ios-sync-engine and wire-ios-transport references. This is the root advisory that pulls the changes together.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Wire Wire | <3.86 |
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Reference Links
- https://github.com/wireapp/wire-ios-sync-engine/security/advisories/GHSA-w727-5f74-49xj
- https://github.com/wireapp/wire-ios-transport/security/advisories/GHSA-p354-6r3m-g4xr
- https://github.com/wireapp/wire-ios/commit/b0e7bb3b13dd8212032cb46e32edf701694687c7
- https://github.com/wireapp/wire-ios/security/advisories/GHSA-6f4c-phfj-m255
- https://github.com/wireapp/wire-server/security/advisories/GHSA-9rm2-w6pq-333m
Frequently Asked Questions
What is CVE-2021-41093?
CVE-2021-41093 is a vulnerability in the Wire messaging application that allows an attacker to take over an account by changing the email using an old but valid access token.
What is the severity of CVE-2021-41093?
CVE-2021-41093 has a severity rating of 9.8, which is considered critical.
How can an attacker exploit CVE-2021-41093?
An attacker can exploit CVE-2021-41093 by obtaining an old but valid access token and using it to change the email associated with an account.
Which version of Wire fixes CVE-2021-41093?
Version 3.86 of Wire fixes the vulnerability CVE-2021-41093.
What additional security measure is implemented in version 3.86 of Wire?
Version 3.86 of Wire uses a new endpoint that requires an authentication cookie in addition to the access token to mitigate the vulnerability.
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