The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
Published 2020-02-24 22:15:12
Updated 2022-09-02 15:30:51
View at NVD,   CVE.org

Threat overview for CVE-2019-17569

Top countries where our scanners detected CVE-2019-17569
Top open port discovered on systems with this issue 80
IPs affected by CVE-2019-17569 14,311
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2019-17569!
*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-2019-17569

0.34%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 69 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-17569

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.8
MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:N
8.6
4.9
NIST
4.8
MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
2.2
2.5
NIST

CWE ids for CVE-2019-17569

  • The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-17569

Products affected by CVE-2019-17569

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