Vulnerability · Published Mar 19, 2021 · Assigned by GitHub_M
CVE-2021-21387Partial secret key disclosure, improper safety number calculation, & inadequate encryption strength
High 8.1
In plain English
A high-severity security flaw in wrongthink from parabirb. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Official description
Wrongthink peer-to-peer, end-to-end encrypted messenger with PeerJS and Axolotl ratchet. In wrongthink from version 2.0.0 and before 2.3.0 there was a set of vulnerabilities causing inadequate encryption strength. Part of the secret identity key was disclosed by the fingerprint used for connection. Additionally, the safety number was improperly calculated. It was computed using part of one of the public identity keys instead of being derived from both public identity keys. This caused issues in computing safety numbers which would potentially be exploitable in the real world. Additionally there was inadequate encryption strength due to use of 1024-bit DSA keys. These issues are all fixed in version 2.3.0.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| parabirb | wrongthink | >= 2.0.0, < 2.2.0 |
Weakness: CWE-319, CWE-326, CWE-358 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
References
- https://github.com/parabirb/wrongthink/security/advisories/GHSA-5jxh-6378-rg7v x_refsource_CONFIRM