PN1628 | Apache Portable Runtime Vulnerability in FactoryTalk® Edge Gateway

Affected Products

Affected Product	First Known in Software Version	Corrected in Software Version
FactoryTalk® Edge Gateway	v1.03.00	v1.04.00

Security Issue Details

Rockwell Automation uses the latest version of the CVSS scoring system to assess security issues. The security of our products is important to us as your industrial automation supplier.  This irregularity was found internally during routine testing and is being reported based on our commitment to customer transparency and to improving production environments.

CVE-2021-35940 IMPACT
An out of bounds array read security issue was fixed in the apr_time_exp*() function in the Apache Portable Runtime v1.6.3 (CVE-2017-12613). The fix for this issue was not carried forward to the APR 1.7.x branch causing version 1.7.0 to regress compared to 1.6.3. Therefore it is vulnerable to the same issue. If exploited, a threat actor could potentially read confidential data or cause the software to become unavailable.

CVSS Base Score: 7.1
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE: CWE 125 Out-of-bounds Read

Known Exploited Vulnerability (KEV) database: No

Customers can use Stakeholder-Specific Vulnerability Categorization to create more environment specific categories.

Risk Mitigation & User Action

Customers using the affected software should use the risk mitigation below and our security best practices to minimize the risks .

• Update to v1.04.00 which mitigates the issue.
• Security Best Practicies: QA43240 - Recommended Security Guidelines from Rockwell Automation

Additional Resources

• CVE 2021 35940 JSON