Bug 1582572 – CVE-2018-10845 gnutls: HMAC-SHA-384 vulnerable to Lucky thirteen attack due to use of wrong constant

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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...

Status:	NEW

Aliases:	CVE-2018-10845

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20180821,repor...
Keywords:	Security

Depends On:	1619518 1619520 1622401 1589706 1589707 1619516 1619517 1619519
Blocks:	1582575
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Reported:	2018-05-25 11:33 EDT by Adam Mariš
Modified:	2018-10-30 03:24 EDT (History)
CC List:	11 users (show)

See Also:
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.
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:3050	None	None	None	2018-10-30 03:24 EDT

Groups: None (edit)

Description Adam Mariš 2018-05-25 11:33:21 EDT

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 01:48:59 EDT

External References:

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

Comment 6 Huzaifa S. Sidhpurwala 2018-08-21 01:50:17 EDT

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 02:01:47 EDT

Upstream patch:

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

Comment 10 errata-xmlrpc 2018-10-30 03:24:46 EDT

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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