OpenSSL up to 1.1.0i/1.1.1 ECDSA key management

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in OpenSSL up to 1.1.0i/1.1.1 and classified as critical. Affected by this issue is some unknown functionality of the component ECDSA. The manipulation leads to key management. This vulnerability is uniquely identified as CVE-2018-0735. The attack is possible to be carried out remotely. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in OpenSSL up to 1.1.0i/1.1.1 (Network Encryption Software). It has been rated as critical. This issue affects an unknown part of the component ECDSA. The manipulation with an unknown input leads to a key management vulnerability. Using CWE to declare the problem leads to CWE-320. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.1.1a (Affected 1.1.1).

The bug was discovered 10/29/2018. The weakness was disclosed 10/28/2018 as confirmed git commit (GIT Repository). The advisory is shared at git.openssl.org. The identification of this vulnerability is CVE-2018-0735 since 11/29/2017. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 118496 (FreeBSD : OpenSSL -- Multiple vulnerabilities in 1.1 branch (238ae7de-dba2-11e8-b713-b499baebfeaf)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176538 (Debian Security Update for openssl (DSA 4348-1)).

Upgrading to version 1.1.0j or 1.1.1a eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.openssl.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 2 hours after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (118496) and SecurityFocus (BID 105750†). The entries VDB-126127, VDB-126937, VDB-129728 and VDB-129632 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Key management
CWE: CWE-320
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 118496
Nessus Name: FreeBSD : OpenSSL -- Multiple vulnerabilities in 1.1 branch (238ae7de-dba2-11e8-b713-b499baebfeaf)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: OpenSSL 1.1.0j/1.1.1a
Patch: 56fb454d281a023b3f950d969693553d3f3ceea1

Timelineinfo

11/29/2017 🔍
10/28/2018 +333 days 🔍
10/29/2018 +0 days 🔍
10/29/2018 +0 days 🔍
10/29/2018 +0 days 🔍
10/29/2018 +0 days 🔍
10/29/2018 +0 days 🔍
10/30/2018 +1 days 🔍
06/03/2023 +1677 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: RHSA-2019:3700
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0735 (🔍)
GCVE (CVE): GCVE-0-2018-0735
GCVE (VulDB): GCVE-100-126017

OVAL: 🔍

SecurityFocus: 105750 - OpenSSL CVE-2018-0735 Side Channel Attack Information Disclosure Vulnerability
SecurityTracker: 1041986

See also: 🔍

Entryinfo

Created: 10/29/2018 16:08
Updated: 06/03/2023 09:59
Changes: 10/29/2018 16:08 (76), 04/07/2020 07:00 (5), 06/03/2023 09:59 (6)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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