OpenSSL up to 1.0.2s/1.1.0k/1.1.1c on Windows mingw OPENSSLDIR certificate validation

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4.2$0-$5k0.00

A vulnerability has been found in OpenSSL up to 1.0.2s/1.1.0k/1.1.1c on Windows (Network Encryption Software) and classified as critical. Affected by this vulnerability is an unknown function of the component mingw. The manipulation of the argument OPENSSLDIR with the input value C:/usr/local leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

OpenSSL has internal defaults for a directory tree where it can find a configuration file as well as certificates used for verification in TLS. This directory is most commonly referred to as OPENSSLDIR, and is configurable with the --prefix / --openssldir configuration options. For OpenSSL versions 1.1.0 and 1.1.1, the mingw configuration targets assume that resulting programs and libraries are installed in a Unix-like environment and the default prefix for program installation as well as for OPENSSLDIR should be '/usr/local'. However, mingw programs are Windows programs, and as such, find themselves looking at sub-directories of 'C:/usr/local', which may be world writable, which enables untrusted users to modify OpenSSL's default configuration, insert CA certificates, modify (or even replace) existing engine modules, etc. For OpenSSL 1.0.2, '/usr/local/ssl' is used as default for OPENSSLDIR on all Unix and Windows targets, including Visual C builds. However, some build instructions for the diverse Windows targets on 1.0.2 encourage you to specify your own --prefix. OpenSSL versions 1.1.1, 1.1.0 and 1.0.2 are affected by this issue. Due to the limited scope of affected deployments this has been assessed as low severity and therefore we are not creating new releases at this time. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

The weakness was disclosed 07/30/2019 as confirmed git commit (GIT Repository). It is possible to read the advisory at git.openssl.org. This vulnerability is known as CVE-2019-1552 since 11/28/2018. Attacking locally is a requirement. The successful exploitation requires a single authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

Upgrading to version 1.0.2t, 1.1.0l or 1.1.1d 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 upgrading to the latest version.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.3
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: Certificate validation
CWE: CWE-295 / CWE-287
ATT&CK: T1587.003

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenSSL 1.0.2t/1.1.0l/1.1.1d
Patch: 54aa9d51b09d67e90db443f682cface795f5af9e

Timelineinfo

11/28/2018 🔍
07/30/2019 +244 days 🔍
07/31/2019 +1 days 🔍
11/14/2023 +1567 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: K94041354
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-1552 (🔍)

Entryinfo

Created: 07/31/2019 09:31
Updated: 11/14/2023 10:07
Changes: 07/31/2019 09:31 (63), 07/16/2020 09:56 (1), 11/14/2023 10:07 (4)
Complete: 🔍

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