Vulnerability Details : 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.
Vulnerability category: Overflow
Products affected by CVE-2021-43083
- cpe:2.3:a:apache:plc4x:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-43083
0.11%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 44 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-43083
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:P |
8.0
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2021-43083
-
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: security@apache.org (Secondary)
-
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.Assigned by:
- nvd@nist.gov (Primary)
- security@apache.org (Secondary)
References for CVE-2021-43083
-
https://lists.apache.org/thread/jxx6qc84z60xbbhn6vp2s5qf09psrtc7
[ANNOUNCE] Apache PLC4X 0.9.1 released-Apache Mail ArchivesVendor Advisory
-
http://www.openwall.com/lists/oss-security/2021/12/20/2
oss-security - CVE-2021-43083: Apache PLC4X 0.9.0 Buffer overflow in PLC4C via crafted server responseMailing List;Third Party Advisory
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