Security Bulletin
Summary
OpenSSL vulnerabilities CVE-2021-3449 and CVE-2021-3450 have been disclosed by the OpenSSL Project. OpenSSL is used by IBM Workload Scheduler. IBM Workload Scheduler has addressed the CVE
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 Workload Automation | 9.5 |
| IBM Workload Automation | 9.4 |
Remediation/Fixes
APAR IJ30802 has been opened to address the openssl vulnerabilities for IBM Workload Scheduler.
APAR IJ30802 has been included in 9.5.0.04. For release 9.4, the apar is available on FixCentral for download, to be applied on top of 9.4.0.07.
For Unsupported releases IBM recommends upgrading to a fixed, supported release of the product.
Workarounds and Mitigations
None
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References
Acknowledgement
Change History
05 Aug 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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Document Information
Modified date:
08 September 2021
Initial Publish date:
05 August 2021
UID
ibm16479351