A stack-based buffer overflow vulnerability exists in both the LLMNR functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted network packet can lead to remote code execution. An attacker can send a malicious packet to trigger this vulnerability.
Published 2022-02-04 23:15:10
Updated 2023-06-26 18:59:22
Source Talos
View at NVD,   CVE.org
Vulnerability category: OverflowInput validationExecute code

Products affected by CVE-2021-21960

Exploit prediction scoring system (EPSS) score for CVE-2021-21960

0.63%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 79 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21960

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST
10.0
CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.9
6.0
Talos
10.0
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.9
6.0
NIST

CWE ids for CVE-2021-21960

  • A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
    Assigned by: talos-cna@cisco.com (Secondary)
  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)
  • The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-21960

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