vulnwire
4.7med

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…

Published 8 y ago · modified 24 d ago · JSON

CVSS
4.7
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
0.9%
percentile 59%
Public exploits
0
none known

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.

Exploit prediction (EPSS)

0.87% probability of exploitation in the next 30 days, higher than 59% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.04.7CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD2.01.9AV:L/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • n/a Libgcrypt before 1.7.10 and 1.8.x before 1.8.3
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

References

  • git.gnupg.org /cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba96 · x_refsource_MISC, x_transferred
  • securitytracker.com /id/1041144 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • usn.ubuntu.com /3850-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • securitytracker.com /id/1041147 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • nccgroup.trust /us/our-research/technical-advisory-return-of-the-hidden-number-problem/ · x_refsource_MISC, x_transferred
  • usn.ubuntu.com /3689-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • lists.gnupg.org /pipermail/gnupg-announce/2018q2/000426.html · x_refsource_MISC, x_transferred
  • usn.ubuntu.com /3689-2/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • usn.ubuntu.com /3692-2/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • lists.debian.org /debian-lts-announce/2018/06/msg00013.html · mailing-list, x_refsource_MLIST, x_transferred
  • debian.org /security/2018/dsa-4231 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • access.redhat.com /errata/RHSA-2018:3505 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • usn.ubuntu.com /3850-2/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • usn.ubuntu.com /3692-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • access.redhat.com /errata/RHSA-2018:3221 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • dev.gnupg.org /T4011 · x_refsource_MISC, x_transferred
  • oracle.com /technetwork/security-advisory/cpuapr2019-5072813.html · x_refsource_MISC, x_transferred
  • access.redhat.com /errata/RHSA-2019:1297 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2019:1296 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2019:1543 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2019:2237 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • cert-portal.siemens.com /productcert/html/ssa-398330.html

Sources

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