Information Exposure Affecting openssl package, versions <1:1.0.2k-16.el7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-RHEL7-OPENSSL-4864430
- published26 Jul 2021
- disclosed13 Jun 2018
Introduced: 13 Jun 2018
CVE-2018-0495 (opens in a new tab)How to fix?
Upgrade RHEL:7 openssl to version 1:1.0.2k-16.el7 or higher.
This issue was patched in RHSA-2018:3221.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
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://access.redhat.com/security/cve/CVE-2018-0495
- https://www.debian.org/security/2018/dsa-4231
- https://dev.gnupg.org/T4011
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=9010d1576e278a4274ad3f4aa15776c28f6ba965
- https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html
- 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
- https://lists.debian.org/debian-lts-announce/2018/06/msg00013.html
- https://access.redhat.com/errata/RHSA-2018:3221
- http://www.securitytracker.com/id/1041144
- http://www.securitytracker.com/id/1041147
- 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://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965