CVE-2016-7056
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure.
- Exploit odds
- 0.6% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.6% in the next 30 days (EPSS).
- Severity: 5.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.6% · EPSS, next 30 days
- Weakness
- CWE-385
- Record status
- Modified
Affected
- OpenSSL ≤ 1.0.1u
- Debian Linux 8.0
- Debian Linux 9.0
- Redhat Enterprise Linux 6.0
- Redhat Enterprise Linux 7.0
- Canonical Ubuntu Linux 12.04
- Canonical Ubuntu Linux 14.04
Attack profile CVSS 3.0 · 5.5
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2016-7056.md and follow it. Check whether this project is affected by CVE-2016-7056. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- http://www.securitytracker.com/id/1037575
- 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://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-7056.html
- https://security-tracker.debian.org/tracker/CVE-2016-7056
- http://www.securitytracker.com/id/1037575
- 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
References
- 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
- 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