Bug 1591831 (CVE-2018-12435)

Summary:	CVE-2018-12435 botan: memory-cache side-channel attack on ECDSA signatures
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bkircher, thomas.moschny
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:29:13 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1591833, 1591834, 1591835
Bug Blocks:

Description Laura Pardo 2018-06-15 16:52:58 UTC

Botan through 2.6.0 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.


References:
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/

Comment 1 Laura Pardo 2018-06-15 16:53:30 UTC

Created botan tracking bugs for this issue:

Affects: epel-all [bug 1591834]
Affects: fedora-all [bug 1591835]


Created botan2 tracking bugs for this issue:

Affects: fedora-all [bug 1591833]

Comment 2 Thomas Moschny 2018-06-15 17:41:22 UTC

Isn't that a duplicate of CVE-2018-0495 ?

Also, botan < 2.5 is (according to upstream) not affected, going to close the botan bugs.

Comment 3 Thomas Moschny 2018-06-15 17:43:32 UTC

(In reply to Thomas Moschny from comment #2)
> Isn't that a duplicate of CVE-2018-0495 ?

i.e. bug 1591163

Comment 4 Product Security DevOps Team 2019-06-10 10:29:13 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.