Bug 1591831 (CVE-2018-12435) - CVE-2018-12435 botan: memory-cache side-channel attack on ECDSA signatures
Summary: CVE-2018-12435 botan: memory-cache side-channel attack on ECDSA signatures
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2018-12435
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: 1591833 1591834 1591835
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-06-15 16:52 UTC by Laura Pardo
Modified: 2019-09-29 14:42 UTC (History)
2 users (show)

Fixed In Version:
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Last Closed: 2019-06-10 10:29:13 UTC
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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.
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