CVE-2020-12403
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
Description
A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest threat from this vulnerability is to confidentiality and system availability.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-12403
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:0538
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rocky | 8 | fixed | |
| debian | bookworm | fixed | 2:3.55-1 |
| debian | bullseye | fixed | 2:3.55-1 |
| debian | forky | fixed | 2:3.55-1 |
| debian | sid | fixed | 2:3.55-1 |
| debian | trixie | fixed | 2:3.55-1 |
References
Verify integrity in audit chain (admin only). AS-IS.