Covert Timing Channel Affecting openssl package, versions <1.0.2a-1
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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- published17 Aug 2026
- disclosed10 Sept 2018
Introduced: 10 Sep 2018
CVE-2016-7056 (opens in a new tab)How to fix?
Upgrade Echo:latest openssl to version 1.0.2a-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
A timing attack flaw was found in OpenSSL 1.0.1u and before that could allow a malicious user with local access to recover ECDSA P-256 private keys.
References
- https://advisory.echohq.com/cve/CVE-2016-7056
- https://git.openssl.org/?p=openssl.git;a=commit;h=8aed2a7548362e88e84a7feb795a3a97e8395008
- https://access.redhat.com/errata/RHBA-2017:1929
- https://access.redhat.com/errata/RHSA-2017:1415
- https://access.redhat.com/security/cve/CVE-2016-7056
- https://bugzilla.redhat.com/show_bug.cgi?id=1412120
- http://rhn.redhat.com/errata/RHSA-2017-1415.html
- http://www.securityfocus.com/bid/95375
- http://www.securitytracker.com/id/1037575
- https://access.redhat.com/errata/RHSA-2017:1413
- https://access.redhat.com/errata/RHSA-2017:1414
- https://access.redhat.com/errata/RHSA-2017:1801
- https://access.redhat.com/errata/RHSA-2017:1802
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7056
- https://eprint.iacr.org/2016/1195
- https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/033_libcrypto.patch.sig
- https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/016_libcrypto.patch.sig
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=8aed2a7548362e88e84a7feb795a3a97e8395008
- https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-7056.html
- https://seclists.org/oss-sec/2017/q1/52
- https://security-tracker.debian.org/tracker/CVE-2016-7056
- https://www.debian.org/security/2017/dsa-3773