CVE-2020-1935

MEDIUM

Apache Tomcat 7.0.0-7.0.99, 8.5.0-8.5.50, 9.0.0.M1-9.0.30 - HTTP Request Smuggling via Invalid Transfer-Encoding Header

Title source: llm

Description

In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led 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.

References (19)

Core 19

Core References

Mailing List, Vendor Advisory mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/r127f76181aceffea2bd4711b03c595d0f115f63e020348fe925a916c%40%3Cannounce.tomcat.apache.org%3E

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html

Broken Link, Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3E

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3E

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2020/dsa-4673

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2020/dsa-4680

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html

Third Party Advisory x_refsource_misc

https://www.oracle.com/security-alerts/cpujul2020.html

Third Party Advisory x_refsource_confirm

https://security.netapp.com/advisory/ntap-20200327-0005/

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/r441c1f30a252bf14b07396286f6abd8089ce4240e91323211f1a2d75%40%3Cusers.tomcat.apache.org%3E

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/r660cd379afe346f10d72c0eaa8459ccc95d83aff181671b7e9076919%40%3Cusers.tomcat.apache.org%3E

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/rd547be0c9d821b4b1000a694b8e58ef9f5e2d66db03a31dfe77c4b18%40%3Cusers.tomcat.apache.org%3E

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/ra5dee390ad2d60307b8362505c059cd6a726de4d146d63dfce1e05e7%40%3Cusers.tomcat.apache.org%3E

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/r80e9c8417c77d52c62809168b96912bda70ddf7748f19f8210f745b1%40%3Cusers.tomcat.apache.org%3E

Third Party Advisory vendor-advisory x_refsource_ubuntu

https://usn.ubuntu.com/4448-1/

Third Party Advisory x_refsource_misc

https://www.oracle.com/security-alerts/cpuoct2020.html

Third Party Advisory x_refsource_misc

https://www.oracle.com/security-alerts/cpujan2021.html

Mailing List mailing-list x_refsource_mlist

https://lists.apache.org/thread.html/r9ce7918faf347e7aac32be930bf26c233b0b140fe37af0bb294158b6%40%3Cdev.tomcat.apache.org%3E

Scores

CVSS v3 4.8

EPSS 0.0939

EPSS Percentile 94.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Details

CWE

CWE-444

Status published

Products (23)

apache/tomcat 9.0.0 (28 CPE variants)

apache/tomcat 7.0.0 - 7.0.99

canonical/ubuntu_linux 16.04

debian/debian_linux 8.0

debian/debian_linux 9.0

debian/debian_linux 10.0

netapp/data_availability_services

netapp/oncommand_system_manager 3.0.0 - 3.1.3

opensuse/leap 15.1

oracle/agile_engineering_data_management 6.2.1.0

... and 13 more

Published Feb 24, 2020

Tracked Since Feb 18, 2026