HOMEVULNERABILITIESCVE-2019-17569
MEDIUM

CVE-2019-17569

CWE-444Published: February 24, 2020· Updated: Jun 17, 2026

4.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2019-17569 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Vendors & Products

Apache2 product(s)
tomcattomee
Debian1 product(s)
debian linux
netapp2 product(s)
data availability servicesoncommand system manager
openSUSE1 product(s)
leap
Oracle10 product(s)
agile engineering data managementagile plmcommunications instant messaging serverhealth sciences empirica inspectionshealth sciences empirica signalhospitality guest accessinstantis enterprisetrackmysql enterprise monitortransportation managementworkload manager
Source: NVD CPE · 22 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://www.oracle.com/security-alerts/cpujan2021.html
PATCHhttps://www.oracle.com/security-alerts/cpujul2020.html
PATCHhttps://www.oracle.com/security-alerts/cpuoct2020.html
PATCHhttps://www.oracle.com/security-alerts/cpujan2021.html
PATCHhttps://www.oracle.com/security-alerts/cpujul2020.html
PATCHhttps://www.oracle.com/security-alerts/cpuoct2020.html
ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
ADVISORYhttps://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3E
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20200327-0005/
ADVISORYhttps://www.debian.org/security/2020/dsa-4673
ADVISORYhttps://www.debian.org/security/2020/dsa-4680
ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
ADVISORYhttps://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3E
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20200327-0005/
ADVISORYhttps://www.debian.org/security/2020/dsa-4673
ADVISORYhttps://www.debian.org/security/2020/dsa-4680

All References (22)

→
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.htmlMailing List · Third Party Advisory
→
https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3E
→
https://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3EMailing List · Vendor Advisory
→
https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3E
→
https://lists.debian.org/debian-lts-announce/2020/03/msg00006.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200327-0005/Third Party Advisory
→
https://www.debian.org/security/2020/dsa-4673Third Party Advisory
→
https://www.debian.org/security/2020/dsa-4680Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujan2021.htmlPatch · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujul2020.htmlPatch · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuoct2020.htmlPatch · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.htmlMailing List · Third Party Advisory
→
https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3E
→
https://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3EMailing List · Vendor Advisory
→
https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3E

Quick Facts

CVE IDCVE-2019-17569
CVSS Score4.8 / 10
SeverityMEDIUM
WeaknessCWE-444
CISA KEVNo
Affected5 vendor(s)
PublishedFeb 24, 2020

Related CVEs (CWE-444)

CVE-2025-1867
10.0
CVE-2018-3907
10.0
CVE-2025-55315
9.9
CVE-2020-1944
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CVE-2015-5739
9.8
CVE-2015-5740
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-17569 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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