Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openbsd | Libressl | < 2.6.5 |
Related Weaknesses (CWE)
References
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txtVendor Advisory
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txtVendor Advisory
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hiddThird Party Advisory
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txtVendor Advisory
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txtVendor Advisory
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hiddThird Party Advisory
FAQ
What is CVE-2018-12434?
CVE-2018-12434 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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 attacke...
How severe is CVE-2018-12434?
CVE-2018-12434 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-12434?
Check the references section above for vendor advisories and patch information. Affected products include: Openbsd Libressl.