Bug 1868931 (CVE-2020-12403) - CVE-2020-12403 nss: CHACHA20-POLY1305 decryption with undersized tag leads to out-of-bounds read
Summary: CVE-2020-12403 nss: CHACHA20-POLY1305 decryption with undersized tag leads to...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-12403
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1868932 1868934 1869064 1898925 1898926 1898934 1905153
Blocks: 1868933
TreeView+ depends on / blocked
 
Reported: 2020-08-14 12:59 UTC by Huzaifa S. Sidhpurwala
Modified: 2021-06-23 04:28 UTC (History)
7 users (show)

Fixed In Version: nss 3.55
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS. 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.
Clone Of:
Environment:
Last Closed: 2020-09-30 03:57:20 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:4076 0 None None None 2020-09-29 20:58:47 UTC
Red Hat Product Errata RHSA-2021:0538 0 None None None 2021-02-16 14:26:23 UTC
Red Hat Product Errata RHSA-2021:0758 0 None None None 2021-03-09 09:17:09 UTC
Red Hat Product Errata RHSA-2021:0876 0 None None None 2021-03-16 14:52:33 UTC

Description Huzaifa S. Sidhpurwala 2020-08-14 12:59:14 UTC 
As per upstream:

Bug 1636771 (CVE-2020-12403) - Explicitly disable multi-part ChaCha20 (which was not functioning correctly) and more strictly enforce tag length. This was fixed in nss-3.55

Upstream bug: (currently private) https://bugzilla.mozilla.org/show_bug.cgi?id=1636771

Upstream patchset:
https://hg.mozilla.org/projects/nss/rev/f282556e6cc7715f5754aeaadda6f902590e7e38
https://hg.mozilla.org/projects/nss/rev/c25adfdfab34ddb08d3262aac3242e3399de1095
Comment 1 Huzaifa S. Sidhpurwala 2020-08-14 12:59:19 UTC 
Acknowledgments:

Name: the Mozilla Project
Comment 2 Huzaifa S. Sidhpurwala 2020-08-14 12:59:23 UTC 
External References:

https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes
Comment 3 Huzaifa S. Sidhpurwala 2020-08-14 12:59:54 UTC 
Created nss tracking bugs for this issue:

Affects: fedora-all [bug 1868932]
Comment 7 errata-xmlrpc 2020-09-29 20:58:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4076 https://access.redhat.com/errata/RHSA-2020:4076
Comment 8 Product Security DevOps Team 2020-09-30 03:57:20 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-12403
Comment 9 errata-xmlrpc 2021-02-16 14:26:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:0538 https://access.redhat.com/errata/RHSA-2021:0538
Comment 10 errata-xmlrpc 2021-03-09 09:17:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Advanced Update Support
  Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.4 Telco Extended Update Support

Via RHSA-2021:0758 https://access.redhat.com/errata/RHSA-2021:0758
Comment 11 errata-xmlrpc 2021-03-16 14:52:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Extended Update Support

Via RHSA-2021:0876 https://access.redhat.com/errata/RHSA-2021:0876
Comment 12 errata-xmlrpc 2021-03-30 09:27:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Extended Update Support

Via RHSA-2021:1026 https://access.redhat.com/errata/RHSA-2021:1026
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