Covert Timing Channel Affecting openssl package, versions <1:1.0.2k-8.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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Test your applications- Snyk IDSNYK-RHEL7-OPENSSL-4480021
- published26 Jul 2021
- disclosed10 Jan 2017
Introduced: 10 Jan 2017
CVE-2016-7056 (opens in a new tab)How to fix?
Upgrade RHEL:7 openssl to version 1:1.0.2k-8.el7 or higher.
This issue was patched in RHBA-2017:1929.
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.
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
- http://www.securityfocus.com/bid/95375
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7056
- 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;a=commit;h=8aed2a7548362e88e84a7feb795a3a97e8395008
- https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-7056.html
- https://security-tracker.debian.org/tracker/CVE-2016-7056
- https://access.redhat.com/security/cve/CVE-2016-7056
- https://www.debian.org/security/2017/dsa-3773
- https://eprint.iacr.org/2016/1195
- https://seclists.org/oss-sec/2017/q1/52
- http://rhn.redhat.com/errata/RHSA-2017-1415.html
- https://access.redhat.com/errata/RHBA-2017:1929
- http://www.securitytracker.com/id/1037575
- https://bugzilla.redhat.com/show_bug.cgi?id=1412120
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=8aed2a7548362e88e84a7feb795a3a97e8395008