An integer overflow vulnerability exists with the length of websocket frames received via a websocket connection. An attacker would use this flaw to cause a denial of service attack on an HTTP Server allowing websocket connections.
Published 2020-12-02 01:15:13
Updated 2023-05-14 01:15:09
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: OverflowDenial of service

Products affected by CVE-2020-27813

Exploit prediction scoring system (EPSS) score for CVE-2020-27813

0.52%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 77 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-27813

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
NIST
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
NIST

CWE ids for CVE-2020-27813

  • The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
    Assigned by:
    • nvd@nist.gov (Primary)
    • secalert@redhat.com (Secondary)
  • The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
    Assigned by:
    • nvd@nist.gov (Primary)
    • secalert@redhat.com (Secondary)

References for CVE-2020-27813

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