Oracle Secure Global Desktop 5.6 OpenSSL certificate validation

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

A vulnerability, which was classified as critical, was found in Oracle Secure Global Desktop 5.6 (Connectivity Software). This affects an unknown code block of the component OpenSSL. The manipulation with an unknown input leads to a weak authentication vulnerability. CWE is classifying the issue as CWE-295. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j).

The weakness was presented 04/21/2021 as Oracle Critical Patch Update Advisory - April 2021. It is possible to read the advisory at oracle.com. This vulnerability is uniquely identified as CVE-2021-3450 since 03/19/2021. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/27/2021). The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.4
VulDB Temp Score: 7.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.4
NVD Vector: 🔒

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

NVD Base Score: 🔒

Exploitinginfoedit

Class: Weak authentication
CWE: CWE-295
ATT&CK: T1587.003

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Upgrade: oracle.com

Timelineinfoedit

03/19/2021 CVE assigned
04/21/2021 +32 days Advisory disclosed
04/21/2021 +0 days Countermeasure disclosed
04/23/2021 +2 days VulDB entry created
04/27/2021 +4 days VulDB last update

Sourcesinfoedit

Vendor: https://www.oracle.com

Advisory: Oracle Critical Patch Update Advisory - April 2021
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2021-3450 (🔒)

Entryinfoedit

Created: 04/23/2021 06:40 AM
Updated: 04/27/2021 08:39 AM
Changes: (18) vulnerability_cwe vulnerability_cvss2_nvd_basescore vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_nvd_basescore vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a exploit_price_0day
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