Description
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.
CVSS breakdown
CVSS 3.0
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected products
- canonical / ubuntu_linux18.10 – 18.10
- canonical / ubuntu_linux12.04 – 12.04
- canonical / ubuntu_linux14.04 – 14.04
- canonical / ubuntu_linux16.04 – 16.04
- canonical / ubuntu_linux17.10 – 17.10
- canonical / ubuntu_linux18.04 – 18.04
- debian / debian_linux8.0 – 8.0
- debian / debian_linux9.0 – 9.0
- gnupg / libgcrypt1.7.10
- oracle / traffic_director11.1.1.9.0 – 11.1.1.9.0
- redhat / ansible_tower3.3 – 3.3
- redhat / enterprise_linux_desktop7.0 – 7.0
- redhat / enterprise_linux_server7.0 – 7.0
- redhat / enterprise_linux_workstation7.0 – 7.0
References
- MISChttps://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965
- MISChttp://www.securitytracker.com/id/1041144
- VENDOR_ADVISORYhttps://usn.ubuntu.com/3850-1/
- MISChttp://www.securitytracker.com/id/1041147
- MISChttps://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/
- VENDOR_ADVISORYhttps://usn.ubuntu.com/3689-1/
- MAILING_LISThttps://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html
- VENDOR_ADVISORYhttps://usn.ubuntu.com/3689-2/
- VENDOR_ADVISORYhttps://usn.ubuntu.com/3692-2/
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2018/06/msg00013.html
- VENDOR_ADVISORYhttps://www.debian.org/security/2018/dsa-4231
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2018:3505
- VENDOR_ADVISORYhttps://usn.ubuntu.com/3850-2/
- VENDOR_ADVISORYhttps://usn.ubuntu.com/3692-1/
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2018:3221
- MISChttps://dev.gnupg.org/T4011
- VENDOR_ADVISORYhttps://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2019:1297
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2019:1296
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2019:1543
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2237
Updated 17m ago · 8 sources