CVE-2018-12434

LibreSSL before 2.6.5 and 2.7.x before 2.7.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

CVSS v3.0 4.7 MEDIUM
CVSS v2.0 1.9 LOW

4.7^/10

CVSS v3.0 : MEDIUM

Vector : AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

1.9^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 3.4 / Impact : 2.9

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/	Third Party Advisory
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txt	Vendor Advisory
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txt	Vendor Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openbsd:libressl:2.7.2:::::::*
	cpe:2.3:a:openbsd:libressl:2.7.1:::::::*
	cpe:2.3:a:openbsd:libressl:2.7.0:::::::*
	cpe:2.3:a:openbsd:libressl::::::::
	cpe:2.3:a:openbsd:libressl:2.7.3:::::::*

Information

Published : 2018-06-14 19:29

Updated : 2018-08-06 09:54

NVD link : CVE-2018-12434

Mitre link : CVE-2018-12434

JSON object : View

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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Products Affected

openbsd

libressl

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