CVE-2018-0495
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.
| Software | From | Fixed in |
|---|---|---|
| gnupg / libgcrypt | - | 1.7.10 |
| gnupg / libgcrypt | 1.8.0 | 1.8.3 |
| canonical / ubuntu_linux | 16.04 | 16.04.x |
| canonical / ubuntu_linux | 14.04 | 14.04.x |
| canonical / ubuntu_linux | 12.04 | 12.04.x |
| canonical / ubuntu_linux | 17.10 | 17.10.x |
| canonical / ubuntu_linux | 18.04 | 18.04.x |
| canonical / ubuntu_linux | 18.10 | 18.10.x |
| debian / debian_linux | 8.0 | 8.0.x |
| debian / debian_linux | 9.0 | 9.0.x |
| redhat / enterprise_linux_desktop | 7.0 | 7.0.x |
| redhat / enterprise_linux_workstation | 7.0 | 7.0.x |
| redhat / enterprise_linux_server | 7.0 | 7.0.x |
| redhat / ansible_tower | 3.3 | 3.3.x |
| oracle / traffic_director | 11.1.1.9.0 | 11.1.1.9.0.x |
- http://www.securitytracker.com/id/1041144
- http://www.securitytracker.com/id/1041147
- https://access.redhat.com/errata/RHSA-2018:3221
- https://access.redhat.com/errata/RHSA-2018:3505
- https://access.redhat.com/errata/RHSA-2019:1296
- https://access.redhat.com/errata/RHSA-2019:1297
- https://access.redhat.com/errata/RHSA-2019:1543
- https://access.redhat.com/errata/RHSA-2019:2237
- https://dev.gnupg.org/T4011
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=9010d1576e278a4274ad3f4aa15776c28f6ba965
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965
- https://lists.debian.org/debian-lts-announce/2018/06/msg00013.html
- https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html
- https://usn.ubuntu.com/3689-1/
- https://usn.ubuntu.com/3689-2/
- https://usn.ubuntu.com/3692-1/
- https://usn.ubuntu.com/3692-2/
- https://usn.ubuntu.com/3850-1/
- https://usn.ubuntu.com/3850-2/
- https://www.debian.org/security/2018/dsa-4231
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
Deep Security Visibility Without the Complexity
SynScan provides clear, real-time security insights so you can monitor your attack surface, spot risks early, and act fast—without extra complexity.
- No setup fees
- 5-min deployment
- Cancel anytime