Is CVE-2021-3450 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 18%.

What products does CVE-2021-3450 affect?

Tracked products affected include PeopleSoft Enterprise PeopleTools, SMA100. Check the version you run to see whether it is affected.

How do I fix CVE-2021-3450?

Apply the vendor fix promptly. Upgrade affected products to a fixed version.

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CVE-2021-3450

Q: What is CVE-2021-3450?

CVE-2021-3450 is a high-severity software vulnerability (CWE-295) with a CVSS score of 7.4. 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 e

HIGH severity · CVSS 7.4 · CWE-295

7.4CVSS HIGH

Summary

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).

Impact & exploitability

Attack vectorNetwork

Attack complexityHigh

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactNone

Exploit probability (EPSS)18%

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

Affected products we track (2)

PeopleSoft Enterprise PeopleTools SMA100

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

CVE-2021-3450

Summary

Impact & exploitability

Affected products we track (2)

Recommendation

Additional information