Summary

Multiple OpenSSL Vulnerabilities released on 28th March 2023

Invalid certificate policies in leaf certificates are silently ignored (CVE-2023-0465)

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Applications that use a non-default option when verifying certificates may be vulnerable to an attack from a malicious CA to circumvent certain checks. Invalid certificate policies in leaf certificates are silently ignored by OpenSSL, and other certificate policy checks are skipped for that certificate. A malicious CA could use this to deliberately assert invalid certificate policies in order to circumvent policy checking on the certificate altogether. Policy processing is disabled by default but can be enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function.

Due to the low severity of this issue, we are not issuing new releases of OpenSSL at this time. The fix will be included in the next releases when they become available. The fix is also available in commit facfb1ab (for 3.1), commit 1dd43e07 (for 3.0), commit b013765a (for 1.1.1) in the OpenSSL git repository, and commit 10325176 (for 1.0.2) in the OpenSSL git repository for premium customers.  

Base Score: 5.3 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Products Affected

All Brocade Fabric OS versions

Products Confirmed Not Affected

• Brocade SANnav

• Brocade ASCG

Solution

Security update in Brocade Fabric OS v9.2.1, v9.2.0b, v9.1.1d, v8.2.3e and later releases.

Certificate policy check not enabled (CVE-2023-0466)

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The function X509_VERIFY_PARAM_add0_policy() is documented to implicitly enable the certificate policy check when doing certificate verification. However the implementation of the function does not enable the check which allows certificates with invalid or incorrect policies to pass the certificate verification. As suddenly enabling the policy check could break existing deployments it was decided to keep the existing behavior of the X509_VERIFY_PARAM_add0_policy() function.

Instead the applications that require OpenSSL to perform certificate policy check need to use X509_VERIFY_PARAM_set1_policies() or explicitly enable the policy check by calling X509_VERIFY_PARAM_set_flags() with the X509_V_FLAG_POLICY_CHECK flag argument. Certificate policy checks are disabled by default in OpenSSL and are not commonly used by applications. OpenSSL 3.1, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.

Base Score: 5.3 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Products Affected

• Brocade Fabric OS v9.2.x and v9.1.1x

Products Confirmed Not Affected

• Brocade Fabric OS v8x

Solution

The security update is provided in Brocade Fabric OS v9.2.1, v9.2.0b, v9.1.1d and later releases

Revision History

Disclaimer

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