Versio.io

CVE-2020-1938

Common vulnerabilities & exposures (CVE)

CVE databaseCVE database blogpostRelease & EoL database
 
Published at: - 24-02-2020 11:15
Last modified: - 29-04-2022 03:24
Total changes: - 7

Description

When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to Apache Tomcat. Tomcat treats AJP connections as having higher trust than, for example, a similar HTTP connection. If such connections are available to an attacker, they can be exploited in ways that may be surprising. In Apache Tomcat 9.0.0.M1 to 9.0.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99, Tomcat shipped with an AJP Connector enabled by default that listened on all configured IP addresses. It was expected (and recommended in the security guide) that this Connector would be disabled if not required. This vulnerability report identified a mechanism that allowed: - returning arbitrary files from anywhere in the web application - processing any file in the web application as a JSP Further, if the web application allowed file upload and stored those files within the web application (or the attacker was able to control the content of the web application by some other means) then this, along with the ability to process a file as a JSP, made remote code execution possible. It is important to note that mitigation is only required if an AJP port is accessible to untrusted users. Users wishing to take a defence-in-depth approach and block the vector that permits returning arbitrary files and execution as JSP may upgrade to Apache Tomcat 9.0.31, 8.5.51 or 7.0.100 or later. A number of changes were made to the default AJP Connector configuration in 9.0.31 to harden the default configuration. It is likely that users upgrading to 9.0.31, 8.5.51 or 7.0.100 or later will need to make small changes to their configurations.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Low
Attack complexity
Network
Attack vector
High
Availability
High
Confidentiality
High
Integrity
None
Privileges required
Unchanged
Scope
None
User interaction
9.8
Base score
3.9
5.9
Exploitability score
Impact score
 

Verification logic

OR
OR
vendor=apache AND product=geode AND version=1.12.0
vendor=apache AND product=Tomcat AND versionEndIncluding=7.0.99 AND versionStartIncluding=7.0.0
vendor=apache AND product=Tomcat AND versionEndIncluding=8.5.50 AND versionStartIncluding=8.5.0
vendor=apache AND product=Tomcat AND versionEndIncluding=9.0.30 AND versionStartIncluding=9.0.0
OR
vendor=fedoraproject AND product=fedora AND version=30
vendor=fedoraproject AND product=fedora AND version=31
vendor=fedoraproject AND product=fedora AND version=32
OR
vendor=oracle AND product=agile_engineering_data_management AND version=6.2.1.0
vendor=oracle AND product=agile_plm AND version=9.3.3
vendor=oracle AND product=agile_plm AND version=9.3.5
vendor=oracle AND product=agile_plm AND version=9.3.6
vendor=oracle AND product=communications_element_manager AND version=8.1.1
vendor=oracle AND product=communications_element_manager AND version=8.2.0
vendor=oracle AND product=communications_element_manager AND version=8.2.1
vendor=oracle AND product=communications_instant_messaging_server AND version=10.0.1.4.0
vendor=oracle AND product=health_sciences_empirica_inspections AND version=1.0.1.2
vendor=oracle AND product=health_sciences_empirica_signal AND version=7.3.3
vendor=oracle AND product=hospitality_guest_access AND version=4.2.0
vendor=oracle AND product=hospitality_guest_access AND version=4.2.1
vendor=oracle AND product=instantis_enterprisetrack AND versionEndIncluding=17.3 AND versionStartIncluding=17.1
vendor=oracle AND product=mysql_enterprise_monitor AND versionEndIncluding=4.0.12
vendor=oracle AND product=mysql_enterprise_monitor AND versionEndIncluding=8.0.20 AND versionStartIncluding=8.0.0
vendor=oracle AND product=siebel_ui_framework AND versionEndIncluding=20.5
vendor=oracle AND product=transportation_management AND version=6.3.7
vendor=oracle AND product=workload_manager AND version=12.2.0.1
vendor=oracle AND product=workload_manager AND version=18c
vendor=oracle AND product=workload_manager AND version=19c
OR
vendor=Debian AND product=debian_linux AND version=8.0
vendor=Debian AND product=debian_linux AND version=9.0
vendor=Debian AND product=debian_linux AND version=10.0
OR
vendor=opensuse AND product=leap AND version=15.1
OR
vendor=blackberry AND product=good_control AND versionEndIncluding=5.2.58.38
vendor=blackberry AND product=workspaces_server AND version=7.0.1
vendor=blackberry AND product=workspaces_server AND version=7.1.2
vendor=blackberry AND product=workspaces_server AND version=8.1.0
vendor=blackberry AND product=workspaces_server AND version=9.0
 

Reference

 


Keywords

NVD

 

CVE-2020-1938

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures

 

We use cookies to ensure that we give you the best experience on our website. Read privacy policies for more information.