PublicDateAtUSN: 2020-08-18 03:55:00 UTC
Candidate: CVE-2020-12403
PublicDate: 2021-05-27 19:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12403
 https://access.redhat.com/security/cve/CVE-2020-12403
 https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes
 https://ubuntu.com/security/notices/USN-4476-1
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.
Ubuntu-Description:
Notes:
Mitigation:
Bugs:
 https://bugzilla.mozilla.org/show_bug.cgi?id=1636771 (private)
Priority: medium
Discovered-by:
Assigned-to: leosilva
CVSS:
 nvd: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H [9.1 CRITICAL]


Patches_nss:
 upstream: https://hg.mozilla.org/projects/nss/rev/f282556e6cc7715f5754aeaadda6f902590e7e38
 upstream: https://hg.mozilla.org/projects/nss/rev/c25adfdfab34ddb08d3262aac3242e3399de1095
upstream_nss: released (3.55)
precise/esm_nss: released (2:3.28.4-0ubuntu0.12.04.11)
trusty_nss: ignored (out of standard support)
trusty/esm_nss: released (2:3.28.4-0ubuntu0.14.04.5+esm8)
xenial_nss: released (2:3.28.4-0ubuntu0.16.04.14)
esm-infra/xenial_nss: released (2:3.28.4-0ubuntu0.16.04.14)
bionic_nss: released (2:3.35-2ubuntu2.12)
focal_nss: released (2:3.49.1-1ubuntu1.5)
devel_nss: released (2:3.55-1ubuntu1)