Security Bulletin: IBM MQ for HPE NonStop Server is affected by OpenSSL vulnerabilities (CVE-2021-3449 and CVE-2021-3450)

Security Bulletin

Summary

IBM MQ for HPE NonStop Server is affected by OpenSSL vulnerabilities (CVE-2021-3449 and CVE-2021-3450).

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 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

Affected Product(s)	Version(s)
IBM MQ for HPE NonStop	8.1.0
IBM MQ for HPE NonStop	8.0.4

Remediation/Fixes

IBM MQ V8 for HPE NonStop	8.1.0.7	IT36850	Install APAR IT36850

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

11 Jun 2021: 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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Tips

Security Bulletin: IBM MQ for HPE NonStop Server is affected by OpenSSL vulnerabilities (CVE-2021-3449 and CVE-2021-3450)