CVE-2020-1935

Aliases:GHSA-qxf4-chvg-4r8rBIT-tomcat-2020-1935
Advisory lineage Upstream: 0 Downstream: 21
Modified
Published: 24 Feb 2020, 21:11
Last modified:04 Aug 2024, 06:53

Vulnerability Summary

Overall Risk (default)
low
23/100
CVSS Score
5.8 MEDIUM
v2.0 (nvd)
EPSS Score
1.38% LOW
1% probability +0.37%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 Feb 2020, 21:11
Published
Vulnerability first disclosed
04 Aug 2024, 06:53
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.8CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  • v2.0•MEDIUM•Score: 5.8AV:N/AC:M/Au:N/C:P/I:P/A:N

EPSS Trends

Current EPSS score: 1.38%• Percentile: 81%

Techniques & Countermeasures

  • CWE-444•Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

    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.

Affected Systems

  • apache•apache tomcat

    Apache Tomcat 9.0.0.M1 to 9.0.30 | 8.5.0 to 8.5.50 | 7.0.0 to 7.0.99

  • Unknown•Tomcat

    ≥ 7.0.0, ≤ 7.0.99 | ≥ 8.5.0, ≤ 8.5.50 | ≥ 9.0.0, ≤ 9.0.30 | 9.0.0 | 9.0.0:milestone1 | 9.0.0:milestone10 | 9.0.0:milestone11 | 9.0.0:milestone12 | 9.0.0:milestone13 | 9.0.0:milestone14 | 9.0.0:milestone15 | 9.0.0:milestone16 | 9.0.0:milestone17 | 9.0.0:milestone18 | 9.0.0:milestone19 | 9.0.0:milestone2 | 9.0.0:milestone20 | 9.0.0:milestone21 | 9.0.0:milestone22 | 9.0.0:milestone23 | 9.0.0:milestone24 | 9.0.0:milestone25 | 9.0.0:milestone26 | 9.0.0:milestone27 | 9.0.0:milestone3 | 9.0.0:milestone4 | 9.0.0:milestone5 | 9.0.0:milestone6 | 9.0.0:milestone7 | 9.0.0:milestone8 | 9.0.0:milestone9

  • canonical•ubuntu_linux

    16.04

  • debian•debian_linux

    8.0 | 9.0 | 10.0

  • org.apache.tomcat•tomcat

    < 7.0.100 | ≥ 8.0.0, < 8.5.51 | ≥ 9.0.0, < 9.0.31

  • org.apache.tomcat.embed•tomcat-embed-core

    < 7.0.100 | ≥ 8.0.0, < 8.5.51 | ≥ 9.0.0, < 9.0.31

  • netapp•data_availability_services

    na

  • netapp•oncommand_system_manager

    ≥ 3.0.0, ≤ 3.1.3

  • opensuse•leap

    15.1

  • oracle•agile_engineering_data_management

    6.2.1.0

  • oracle•agile_product_lifecycle_management

    9.3.3 | 9.3.5 | 9.3.6

  • oracle•communications_element_manager

    8.1.1 | 8.2.0 | 8.2.1

  • oracle•communications_instant_messaging_server

    10.0.1.4.0

  • oracle•health_sciences_empirica_inspections

    1.0.1.2

  • oracle•health_sciences_empirica_signal

    7.3.3

  • oracle•hospitality_guest_access

    4.2.0 | 4.2.1

  • oracle•hyperion_infrastructure_technology

    11.1.2.4

  • oracle•instantis_enterprisetrack

    ≥ 17.1, ≤ 17.3

  • oracle•mysql_enterprise_monitor

    ≥ 4.0.0, ≤ 4.0.12 | ≥ 8.0.0, ≤ 8.0.20

  • oracle•retail_order_broker

    15.0

  • oracle•siebel_ui_framework

    ≤ 20.5

  • oracle•transportation_management

    6.3.7

  • oracle•workload_manager

    12.2.0.1 | 18c | 19c

References (30)