Apache PLC4X 0.9.0 Buffer overflow in PLC4C via crafted server response
CVE-2021-43083

8.8HIGH

Key Information:

Vendor

Apache
Status
Apache Plc4x
Vendor
CVE Published:
19 December 2021

What is CVE-2021-43083?

Apache PLC4X - PLC4C (Only the C language implementation was effected) was vulnerable to an unsigned integer underflow flaw inside the tcp transport. Users should update to 0.9.1, which addresses this issue. However, in order to exploit this vulnerability, a user would have to actively connect to a mallicious device which could send a response with invalid content. Currently we consider the probability of this being exploited as quite minimal, however this could change in the future, especially with the industrial networks growing more and more together.

Affected Version(s)

Apache PLC4X PLC4C <= 0.9.0

References

https://lists.apache.org/thread/jxx6qc84z60xbbhn6vp2s5qf0...
x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/12/20/2
mailing-listx_refsource_MLIST

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Apache PLC4X would like to thank Eugene Lim for reporting this issue.
.