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CVE-2020-1938
DEB
High KEVConfirmedExploit available

When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to Apache Tomcat. Tomcat treats AJP conne…

CVSS
7.6
High
EPSS
0.94
p99
Published
2020-01-01
Updated
2022-03-03
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.

Tags · CWE
KEV
CWE-285
CAPEC-1
CAPEC-5
CAPEC-13
CAPEC-17
CAPEC-39
CAPEC-45
CAPEC-51
CAPEC-59
CAPEC-60
CAPEC-76
CAPEC-77
CAPEC-87
CAPEC-104
CAPEC-127
CAPEC-402
CAPEC-647
CAPEC-668
Affected products
Glassfish-jsf12-eap6Glassfish-jsf12-eap6Glassfish-jsf12-eap6HornetqHornetqHornetqIronjacamar-eap6Ironjacamar-eap6Ironjacamar-eap6Jbosgi-repositoryJbosgi-repositoryJbosgi-repositoryJboss-as-appclientJboss-as-appclientJboss-as-appclientJboss-as-cliJboss-as-cliJboss-as-cliJboss-as-client-allJboss-as-client-all
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Timeline
2020-01-01
Published
2022-03-03
Added to KEV
2022-03-03
Updated
CVSS 3.1 breakdown
Attack Vector
AV: A
Adjacent Network (A)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: N
None (N)
Scope
S: U
Unchanged (U)
Confidentiality Impact
C: H
High (H)
Integrity Impact
I: L
Low (L)
Availability Impact
A: L
Low (L)
Exploit indicators
EPSS
0.945 · p99
Known exploited (KEV)
Yes
MITRE ATT&CK
Inferred via CAPEC
└ via CAPEC-647 · CWE-285
└ via CAPEC-647 · CWE-285
└ via CAPEC-127 · CWE-285
└ via CAPEC-60 · CWE-285
└ via CAPEC-60 · CWE-285
└ via CAPEC-647 · CWE-285
└ via CAPEC-668 · CWE-285
└ via CAPEC-13 · CWE-285
Known exploits — Сканер-ВС
48143
exploitdb · https://www.exploit-db.com/exploits/48143
Enterprise
49039
exploitdb · https://www.exploit-db.com/exploits/49039
Enterprise
CVE-2020-1938
github-poc · https://github.com/duckpigdog/Tomcat-AJP-CVE-2020-1938
Enterprise
Affected software
ProductVendorStatus
glassfish-jsf12-eap6Exploited
glassfish-jsf12-eap6Exploited
glassfish-jsf12-eap6Exploited
hornetqExploited
hornetqExploited
hornetqExploited
ironjacamar-eap6Exploited
ironjacamar-eap6Exploited
ironjacamar-eap6Exploited
jbosgi-repositoryExploited
jbosgi-repositoryExploited
jbosgi-repositoryExploited
jboss-as-appclientExploited
jboss-as-appclientExploited
jboss-as-appclientExploited
jboss-as-cliExploited
jboss-as-cliExploited
jboss-as-cliExploited
jboss-as-client-allExploited
jboss-as-client-allExploited
Source databases
DEB
CVE
RED
UBU
Related vulnerabilities