Vulnerability Details : 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.
Vulnerability category: Information leak
Products affected by CVE-2018-12434
- cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:*
- 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:2.7.3:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-12434
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 21 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-12434
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
1.9
|
LOW | AV:L/AC:M/Au:N/C:P/I:N/A:N |
3.4
|
2.9
|
NIST | |
|
4.7
|
MEDIUM | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
1.0
|
3.6
|
NIST |
CWE ids for CVE-2018-12434
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-12434
-
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/
Technical Advisory: "ROHNP"- Key Extraction Side Channel in Multiple Crypto LibrariesThird 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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