Bug 1582572 (CVE-2018-10845) - CVE-2018-10845 gnutls: HMAC-SHA-384 vulnerable to Lucky thirteen attack due to use of wrong constant
Summary: CVE-2018-10845 gnutls: HMAC-SHA-384 vulnerable to Lucky thirteen attack due t...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-10845
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: 1619518 1619520 1589706 1589707 1619516 1619517 1619519 1622401
Blocks: 1582575
TreeView+ depends on / blocked
 
Reported: 2018-05-25 15:33 UTC by Adam Mariš
Modified: 2019-09-29 14:40 UTC (History)
11 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
It was found that GnuTLS's implementation of HMAC-SHA-384 was vulnerable to a Lucky Thirteen-style attack. A remote attacker could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.
Clone Of:
Environment:
Last Closed: 2019-06-10 10:26:38 UTC


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System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3050 None None None 2018-10-30 07:24:57 UTC

Description Adam Mariš 2018-05-25 15:33:21 UTC
It was found that GnuTLS implementation of HMAC-SHA-384 was vulnerable to Lucky thirteen style attack due to use of wrong constant appropriate to hash functions that encode the length field.

Comment 5 Huzaifa S. Sidhpurwala 2018-08-21 05:48:59 UTC
External References:

https://eprint.iacr.org/2018/747

Comment 6 Huzaifa S. Sidhpurwala 2018-08-21 05:50:17 UTC
Created gnutls tracking bugs for this issue:

Affects: fedora-all [bug 1619517]


Created gnutls30 tracking bugs for this issue:

Affects: epel-all [bug 1619519]


Created mingw-gnutls tracking bugs for this issue:

Affects: epel-all [bug 1619520]
Affects: fedora-all [bug 1619518]

Comment 8 Huzaifa S. Sidhpurwala 2018-08-21 06:01:47 UTC
Upstream patch:

https://gitlab.com/gnutls/gnutls/merge_requests/657

Comment 10 errata-xmlrpc 2018-10-30 07:24:46 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3050 https://access.redhat.com/errata/RHSA-2018:3050


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