UBUNTU-CVE-2018-0495

Dashboard / Vulnerabilities / UBUNTU-CVE-2018-0495

UBUNTU-CVE-2018-0495

Summary:

Details: Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, 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.

References: https://ubuntu.com/security/CVE-2018-0495, https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/, https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html, https://ubuntu.com/security/notices/USN-3689-1, https://ubuntu.com/security/notices/USN-3689-2, https://ubuntu.com/security/notices/USN-3692-1, https://ubuntu.com/security/notices/USN-3692-2, https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.38_release_notes, https://ubuntu.com/security/notices/USN-3850-1, https://ubuntu.com/security/notices/USN-3850-2, https://www.cve.org/CVERecord?id=CVE-2018-0495