Vulnerability Monitor

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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.

Published

2018-06-15T02:29:00.330

Last Modified

2024-11-21T03:45:12.770

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 4.7 (MEDIUM)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

3.4

Impact Score

2.9

Weaknesses

Type: Primary
CWE-200

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openbsd	libressl	< 2.6.5	Yes
Application	openbsd	libressl	2.7.0	Yes
Application	openbsd	libressl	2.7.1	Yes
Application	openbsd	libressl	2.7.2	Yes
Application	openbsd	libressl	2.7.3	Yes

References

https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txt Vendor Advisory ([email protected])
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txt Vendor Advisory ([email protected])
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Third Party Advisory ([email protected])
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txt Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txt Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)