CVE-2021-43083: Integer Underflow (Wrap or Wraparound)

December 19, 2021 (updated January 4, 2022)

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, 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.

References

www.openwall.com/lists/oss-security/2021/12/20/2
lists.apache.org/thread/jxx6qc84z60xbbhn6vp2s5qf09psrtc7
nvd.nist.gov/vuln/detail/CVE-2021-43083

Code Behaviors & Features

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