Stack overflow via TIS_CODESET environment variable in IBM Workload Scheduler chkhltst program on Linux, Unix.
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
|IBM Workload Scheduler||9.5|
|IBM Workload Scheduler||9.4|
APAR IJ30794 has been opened to address CVE-2021-20349.
Apar IJ30794 has been included in IBM Workload Scheduler 126.96.36.199 and it is already available on FixCentral for 9.4 release (940-TIV-TWS-FP7-IJ30794) to be applied on top of 188.8.131.52.
Workarounds and Mitigations
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This vulnerability was reported to IBM by Maciej Grabiec and Lukasz Plonka.
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.
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
09 August 2021