OpenSSL 1.0.1f/1.0.1l ECDSA cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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3.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in OpenSSL 1.0.1f/1.0.1l. This vulnerability affects unknown code of the component ECDSA. Such manipulation leads to cryptographic issue. This vulnerability is documented as CVE-2014-0076. There is not any exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in OpenSSL 1.0.1f/1.0.1l (Network Encryption Software) and classified as problematic. Affected by this issue is some unknown functionality of the component ECDSA. The manipulation with an unknown input leads to a cryptographic issue vulnerability. Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality. CVE summarizes:

The Montgomery ladder implementation in OpenSSL through 1.0.0l does not ensure that certain swap operations have a constant-time behavior, which makes it easier for local users to obtain ECDSA nonces via a FLUSH+RELOAD cache side-channel attack.

The issue has been introduced in 01/06/2014. The weakness was released 02/24/2014 by Yuval Yarom and Naomi Benger as Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack as confirmed paper (Website). The advisory is available at eprint.iacr.org. This vulnerability is handled as CVE-2014-0076 since 12/03/2013. Local access is required to approach this attack. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600 by the MITRE ATT&CK project. The advisory points out:

We illustrate a vulnerability introduced to elliptic curve cryptographic protocols when implemented using a function of the OpenSSL cryptographic library. For the given implementation using an elliptic curve E over a binary field with a point G \in E, our attack recovers the majority of the bits of a scalar k when kG is computed using the OpenSSL implementation of the Montgomery ladder. For the Elliptic Curve Digital Signature Algorithm (ECDSA) the scalar k is intended to remain secret. Our attack recovers the scalar k and thus the secret key of the signer and would therefore allow unlimited forgeries. This is possible from snooping on only one signing process and requires computation of less than one second on a quad core desktop when the scalar k (and secret key) is around 571 bits.

The vulnerability was handled as a non-public zero-day exploit for at least 49 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 74288 (IBM Global Security Kit 7 < 7.0.4.50 / 8.0.14.x < 8.0.14.43 / 8.0.50.x < 8.0.50.20 Multiple Vulnerabilities (Linux)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family General and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175900 (Debian Security Update for openssl (DSA 2908-1)).

Applying the patch Fix for CVE-2014-0076 is able to eliminate this problem. The bugfix is ready for download at github.com. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (91990), Tenable (74288), SecurityFocus (BID 66363†), Secunia (SA57091†) and SecurityTracker (ID 1030027†). Entry connected to this vulnerability is available at VDB-67655. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • McAfee Web Gateway up to 7.3.2.10/7.4.2.1

Productinfo

Type

Name

Version

License

Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.5

VulDB Base Score: 4.0
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74288
Nessus Name: IBM Global Security Kit 7 < 7.0.4.50 / 8.0.14.x < 8.0.14.43 / 8.0.50.x < 8.0.50.20 Multiple Vulnerabilities (Linux)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 702908
OpenVAS Name: Debian Security Advisory DSA 2908-1 (openssl - security update
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: Fix for CVE-2014-0076

Timelineinfo

12/03/2013 🔍
01/06/2014 +34 days 🔍
02/24/2014 +49 days 🔍
02/24/2014 +0 days 🔍
03/21/2014 +25 days 🔍
03/25/2014 +4 days 🔍
03/25/2014 +0 days 🔍
04/08/2014 +14 days 🔍
05/01/2014 +23 days 🔍
06/03/2014 +33 days 🔍
05/03/2019 +1795 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack
Researcher: Yuval Yarom, Naomi Benger
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-0076 (🔍)
GCVE (CVE): GCVE-0-2014-0076
GCVE (VulDB): GCVE-100-12686

OVAL: 🔍
IAVM: 🔍

X-Force: 91990 - OpenSSL ECDSA information disclousre, Medium Risk
SecurityFocus: 66363 - OpenSSL CVE-2014-0076 Information Disclosure Weakness
Secunia: 57091 - OpenSSL ECDSA Nonces Recovery Weakness, Not Critical
SecurityTracker: 1030027

See also: 🔍

Entryinfo

Created: 03/25/2014 09:26
Updated: 05/03/2019 10:37
Changes: 03/25/2014 09:26 (95), 05/03/2019 10:37 (3)
Complete: 🔍
Cache ID: 216:0A3:103

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