An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 did not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service.
Published 2020-07-14 15:15:11
Updated 2022-03-01 21:02:00
View at NVD,   CVE.org
Vulnerability category: Denial of service

Threat overview for CVE-2020-13934

Top countries where our scanners detected CVE-2020-13934
Top open port discovered on systems with this issue 80
IPs affected by CVE-2020-13934 250,186
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2020-13934!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2020-13934

Probability of exploitation activity in the next 30 days: 89.01%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 98 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-13934

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
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-2020-13934

  • The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.
    Assigned by: nvd@nist.gov (Primary)
  • A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-13934

Products affected by CVE-2020-13934

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