Security Bulletin
Summary
Stack overflow via TIS_CODESET environment variable in IBM Workload Scheduler chkhltst program on Linux, Unix.
Vulnerability Details
CVEID: CVE-2021-20349
DESCRIPTION: IBM Tivoli Workload Scheduler is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local attacker could overflow a buffer and gain lower level privileges.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/194599 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Workload Scheduler | 9.5 |
| IBM Workload Scheduler | 9.4 |
Remediation/Fixes
APAR IJ30794 has been opened to address CVE-2021-20349.
Apar IJ30794 has been included in IBM Workload Scheduler 9.5.0.4 and it is already available on FixCentral for 9.4 release (940-TIV-TWS-FP7-IJ30794) to be applied on top of 9.4.0.7.
Workarounds and Mitigations
None
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References
Acknowledgement
This vulnerability was reported to IBM by Maciej Grabiec and Lukasz Plonka.
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:
09 August 2021
UID
ibm16479347