Vulnerability Details : CVE-2021-45933
wolfSSL wolfMQTT 1.9 has a heap-based buffer overflow (8 bytes) in MqttDecode_Publish (called from MqttClient_DecodePacket and MqttClient_HandlePacket).
Vulnerability category: OverflowMemory Corruption
Products affected by CVE-2021-45933
- cpe:2.3:a:wolfssl:wolfmqtt:1.9:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-45933
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-45933
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2021-45933
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-45933
-
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=38237
38237 - wolfmqtt:wolfmqtt-fuzzer: Heap-buffer-overflow in MqttDecode_Publish - oss-fuzzExploit;Issue Tracking;Third Party Advisory
-
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wolfmqtt/OSV-2021-1211.yaml
oss-fuzz-vulns/OSV-2021-1211.yaml at main · google/oss-fuzz-vulns · GitHubExploit;Third Party Advisory
-
https://github.com/wolfSSL/wolfMQTT/commit/84d4b53122e0fa0280c7872350b89d5777dabbb2
Fix wolfmqtt-fuzzer: Null-dereference WRITE in MqttProps_Free · wolfSSL/wolfMQTT@84d4b53 · GitHubPatch;Third Party Advisory
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