CVE-2018-12436 json
wolfcrypt/src/ecc.c in wolfSSL before 3.15.1.patch allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hid…
published 2018-06-15 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-4407
- cvss
- 4.7
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
wolfcrypt/src/ecc.c in wolfSSL before 3.15.1.patch 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.
Patch / fix
- wolfssl wolfssl 3.15.3
- wolfssl Debian 13, Debian 12 3.15.3+dfsg-1
debian advisories DEBIAN-CVE-2018-12436
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 4.7 | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 1.9 | AV:L/AC:M/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/wolfSSL/wolfssl/commit/9b9568d500f31f964af26ba8d01e542e1f27e5ca
patch, third-party-advisory
-
wolfssl.com
/wolfssh-and-rohnp/
vendor-advisory
-
nccgroup.trust
/us/our-research/technical-advisory-return-of-the-hidden-number-problem/
third-party-advisory
Sources
- CVE List CVE-2018-12436
- NVD CVE-2018-12436
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