PT-2021-23744 · Apache · Apache Plc4X

Eugene Lim · Published 2021-12-19 · Updated 2022-01-04 · CVE-2021-43083

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Apache PLC4X - PLC4C versions prior to 0.9.1

Description The issue is related to an unsigned integer underflow flaw inside the tcp transport. To exploit this, a user would have to actively connect to a malicious device that could send a response with invalid content. The probability of this being exploited is currently considered minimal, but this could change in the future, especially with industrial networks growing together.

Recommendations For versions prior to 0.9.1, update to version 0.9.1 to address the issue. As a temporary workaround, consider restricting connections to trusted devices to minimize the risk of exploitation.

Fix

Integer Underflow

Buffer Overflow

Weakness Enumeration

CWE-191

CWE-119

Related Identifiers

CVE-2021-43083

Affected Products

Apache Plc4X

References · 5

• https://lists.apache.org/thread/jxx6qc84z60xbbhn6vp2s5qf09psrtc7 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-43083 · Security Note
• https://osv.dev/vulnerability/CVE-2021-43083 · Vendor Advisory
• https://t.me/cvenotify/24621 · Telegram Post
• http://openwall.com/lists/oss-security/2021/12/20/2 · Note