CVE-2018-12434

Severity Score

4.7

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

LibreSSL en versiones anteriores a la 2.6.5 y versiones 2.7.x anteriores a la 2.7.4 permite un ataque de canal lateral por caché de memoria en las firmas DSA y ECDSA. Esto también se conoce como Return Of the Hidden Number Problem (ROHNP). Para descubrir una clave, el atacante necesita acceso a la máquina local o a una máquina virtual diferente en el mismo host físico.

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-06-14 CVE Reserved
2018-06-15 CVE Published
2024-09-16 CVE Updated
2024-09-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

CAPEC

References (3)

URL	Tag	Source
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txt	2018-08-06
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txt	2018-08-06

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openbsd Search vendor "Openbsd"		Libressl Search vendor "Openbsd" for product "Libressl"				< 2.6.5 Search vendor "Openbsd" for product "Libressl" and version " < 2.6.5"		-		Affected
Openbsd Search vendor "Openbsd"		Libressl Search vendor "Openbsd" for product "Libressl"				2.7.0 Search vendor "Openbsd" for product "Libressl" and version "2.7.0"		-		Affected
Openbsd Search vendor "Openbsd"		Libressl Search vendor "Openbsd" for product "Libressl"				2.7.1 Search vendor "Openbsd" for product "Libressl" and version "2.7.1"		-		Affected
Openbsd Search vendor "Openbsd"		Libressl Search vendor "Openbsd" for product "Libressl"				2.7.2 Search vendor "Openbsd" for product "Libressl" and version "2.7.2"		-		Affected
Openbsd Search vendor "Openbsd"		Libressl Search vendor "Openbsd" for product "Libressl"				2.7.3 Search vendor "Openbsd" for product "Libressl" and version "2.7.3"		-		Affected