Security Bulletin: IBM Security Verify Adapters are vulnerable to denial of service and bypass security restrictions due to OpenSSL (CVE-2021-3449, CVE-2021-3450)

Security Bulletin

Summary

OpenSSL is used by the IBM Security Verify Adapters as part of its SSL communication. IBM Security Verify Adapters are vulnerable to denial of service (CVE-2021-3449) and could allow a remote attacker to bypass security restrictions (CVE-2021-3450) The fix includes OpenSSL version 1.1.1k.

Vulnerability Details

CVEID: CVE-2021-3449
DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a NULL pointer dereference in signature_algorithms processing. By sending a specially crafted renegotiation ClientHello message from a client, a remote attacker could exploit this vulnerability to cause the TLS server to crash.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/198752 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2021-3450
DESCRIPTION: OpenSSL could allow a remote attacker to bypass security restrictions, caused by a missing check in the validation logic of X.509 certificate chains by the X509_V_FLAG_X509_STRICT flag. By using any valid certificate or certificate chain to sign a specially crafted certificate, an attacker could bypass the check that non-CA certificates must not be able to issue other certificates and override the default purpose.
CVSS Base score: 7.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/198754 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H)

Affected Products and Versions

Adapter Name	Version
IBM Security Verify Adapter for Lotus Notes	7.1.16, 6.0.16
IBM Security Verify Adapter for Microsoft SQL Server	7.1.18, 6.0.18
IBM Security Verify Adapter for Windows Active Directory	10.0.1
IBM Security Verify Adapter for Windows Local Accounts	7.1.20, 6.0.20

Remediation/Fixes

IBM encourages customers to update their systems promptly.

Adapter Name	Version
IBM Security Verify Adapter for Lotus Notes	10.0.1 or higher
IBM Security Verify Adapter for Microsoft SQL Server	10.0.1 or higher
IBM Security Verify Adapter for Windows Active Directory	10.0.2 or higher
IBM Security Verify Adapter for Windows Local Accounts	10.0.1 or higher

To download the IBM Security Verify Adapter, sign into IBM Passport Advantage Online (PAO) website. Note, you must be an authorized user from your company to sign in.
Enter the adapter name text string for search by Product name.

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

Change History

11 May 2022: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Document Information

Modified date:
23 May 2022

Initial Publish date:
11 May 2022

UID

ibm16589173

Tips

Security Bulletin: IBM Security Verify Adapters are vulnerable to denial of service and bypass security restrictions due to OpenSSL (CVE-2021-3449, CVE-2021-3450)