OpenSSL up to 1.0.1u crypto/ec/ecdsa_ossl.c ecdsa_sign_setup key management
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
4.7 | $0-$5k | 0.00 |
A vulnerability classified as problematic was found in OpenSSL up to 1.0.1u (Network Encryption Software). Affected by this vulnerability is the function ecdsa_sign_setup
of the file crypto/ec/ecdsa_ossl.c. The manipulation with an unknown input leads to a key management vulnerability. The CWE definition for the vulnerability is CWE-320. As an impact it is known to affect confidentiality. The summary by CVE 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.
The bug was discovered 01/10/2017. The weakness was published 01/10/2017 by Cesar Pereida García and Billy Bob Brumley as Cryptology ePrint Report 2016/1195 as confirmed paper (Website). It is possible to read the advisory at ia.cr. The public release has been coordinated with the project team. This vulnerability is known as CVE-2016-7056 since 08/23/2016. Attacking locally is a requirement. The requirement for exploitation is a single authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.
The vulnerability was handled as a non-public zero-day exploit for at least 22 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 99134 (macOS 10.12.x < 10.12.4 Multiple Vulnerabilities (httpoxy)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175949 (Debian Security Update for openssl (DSA 3773-1)).
Applying a patch is able to eliminate this problem. The bugfix is ready for download at ia.cr. A possible mitigation has been published immediately after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (99134). Similar entries are available at 93073, 93752, 94628 and 96036.
Product
Type
Name
Version
- 1.0.1a
- 1.0.1b
- 1.0.1c
- 1.0.1d
- 1.0.1e
- 1.0.1f
- 1.0.1g
- 1.0.1h
- 1.0.1i
- 1.0.1j
- 1.0.1k
- 1.0.1l
- 1.0.1m
- 1.0.1n
- 1.0.1o
- 1.0.1p
- 1.0.1q
- 1.0.1r
- 1.0.1s
- 1.0.1t
- 1.0.1u
License
Support
- end of life (old version)
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 4.8VulDB Meta Temp Score: 4.7
VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.5
NVD Vector: 🔍
CNA Base Score: 5.5
CNA Vector (Red Hat, Inc.): 🔍
CVSSv2
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
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VulDB Base Score: 🔍
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Exploiting
Class: Key managementCWE: CWE-320
CAPEC: 🔍
ATT&CK: 🔍
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Nessus ID: 99134
Nessus Name: macOS 10.12.x < 10.12.4 Multiple Vulnerabilities (httpoxy)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-HT207615
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Patch: 8aed2a7548362e88e84a7feb795a3a97e8395008
Timeline
08/23/2016 🔍12/19/2016 🔍
01/10/2017 🔍
01/10/2017 🔍
01/10/2017 🔍
01/10/2017 🔍
01/10/2017 🔍
01/13/2017 🔍
03/31/2017 🔍
09/10/2018 🔍
10/28/2022 🔍
Sources
Product: openssl.orgAdvisory: Cryptology ePrint Report 2016/1195
Researcher: Cesar Pereida García, Billy Bob Brumley
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍
CVE: CVE-2016-7056 (🔍)
OVAL: 🔍
SecurityTracker: 1037575
SecurityFocus: 95375 - OpenSSL CVE-2016-7056 Local Information Disclosure Vulnerability
OSVDB: - CVE-2016-7056 - OpenSSL - Timing Attack Issue
See also: 🔍
Entry
Created: 01/13/2017 11:33Updated: 10/28/2022 14:21
Changes: 01/13/2017 11:33 (76), 07/21/2020 11:40 (17), 10/28/2022 14:17 (3), 10/28/2022 14:21 (12)
Complete: 🔍
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