Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Nss | < 3.55 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1868931Issue TrackingPatchThird Party Advisory
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_nRelease NotesVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
- https://security.netapp.com/advisory/ntap-20230324-0006/
- https://bugzilla.redhat.com/show_bug.cgi?id=1868931Issue TrackingPatchThird Party Advisory
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_nRelease NotesVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
- https://security.netapp.com/advisory/ntap-20230324-0006/
FAQ
What is CVE-2020-12403?
CVE-2020-12403 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 dis...
How severe is CVE-2020-12403?
CVE-2020-12403 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2020-12403?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Nss.