Executive Summary

Informations
Name CVE-2020-1938 First vendor Publication 2020-02-24
Vendor Cve Last vendor Modification 2020-07-23

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 9.8
Base Score 9.8 Environmental Score 9.8
impact SubScore 5.9 Temporal Score 9.8
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1938

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 480

Snort® IPS/IDS

Date Description
2020-02-26 Apache Tomcat AJP connector arbitrary file access attempt
RuleID : 53341-community - Revision : 2 - Type : SERVER-APACHE
2020-03-31 Apache Tomcat AJP connector arbitrary file access attempt
RuleID : 53341 - Revision : 2 - Type : SERVER-APACHE

Sources (Detail)

Source Url
CONFIRM http://support.blackberry.com/kb/articleDetail?articleNumber=000062739
https://security.netapp.com/advisory/ntap-20200226-0002/
DEBIAN https://www.debian.org/security/2020/dsa-4673
https://www.debian.org/security/2020/dsa-4680
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
GENTOO https://security.gentoo.org/glsa/202003-43
MISC https://www.oracle.com/security-alerts/cpujul2020.html
MLIST https://lists.apache.org/thread.html/r089dc67c0358a1556dd279c762c74f32d7a254a...
https://lists.apache.org/thread.html/r17aaa3a05b5b7fe9075613dd0c681efa60a4f8c...
https://lists.apache.org/thread.html/r38a5b7943b9a62ecb853acc22ef08ff586a7b3c...
https://lists.apache.org/thread.html/r43faacf64570b1d9a4bada407a5af3b2738b0c0...
https://lists.apache.org/thread.html/r4afa11e0464408e68f0e9560e90b185749363a6...
https://lists.apache.org/thread.html/r4f86cb260196e5cfcbbe782822c225ddcc70f54...
https://lists.apache.org/thread.html/r549b43509e387a42656f0641fa311bf27c127c2...
https://lists.apache.org/thread.html/r5e2f1201b92ee05a0527cfc076a81ea0c270be2...
https://lists.apache.org/thread.html/r61f280a76902b594692f0b24a1dbf647bb5a4c1...
https://lists.apache.org/thread.html/r6a5633cad1b560a1e51f5b425f02918bdf30e09...
https://lists.apache.org/thread.html/r74328b178f9f37fe759dffbc9c1f2793e66d79d...
https://lists.apache.org/thread.html/r75113652e46c4dee687236510649acfb70d2c63...
https://lists.apache.org/thread.html/r772335e6851ad33ddb076218fa4ff70de1bf398...
https://lists.apache.org/thread.html/r7c6f492fbd39af34a68681dbbba0468490ff1a9...
https://lists.apache.org/thread.html/r856cdd87eda7af40b50278d6de80ee4b42d63ad...
https://lists.apache.org/thread.html/r8f7484589454638af527182ae55ef5b628ba00c...
https://lists.apache.org/thread.html/r92d78655c068d0bc991d1edbdfb24f9c5134603...
https://lists.apache.org/thread.html/r9f119d9ce9239114022e13dbfe385b3de7c972f...
https://lists.apache.org/thread.html/ra7092f7492569b39b04ec0decf52628ba86c51f...
https://lists.apache.org/thread.html/rad36ec6a1ffc9e43266b030c22ceeea56924355...
https://lists.apache.org/thread.html/rb1c0fb105ce2b93b7ec6fc1b77dd208022621a9...
https://lists.apache.org/thread.html/rb2fc890bef23cbc7f343900005fe1edd3b091cf...
https://lists.apache.org/thread.html/rbdb1d2b651a3728f0ceba9e0853575b6f90296a...
https://lists.apache.org/thread.html/rc068e824654c4b8bd4f2490bec869e29edbfcd5...
https://lists.apache.org/thread.html/rcd5cd301e9e7e39f939baf2f5d58704750be07a...
https://lists.apache.org/thread.html/rce2af55f6e144ffcdc025f997eddceb315dfbc0...
https://lists.apache.org/thread.html/rd0774c95699d5aeb5e16e9a600fb2ea296e8117...
https://lists.apache.org/thread.html/rd50baccd1bbb96c2327d5a8caa25a49692b3d68...
https://lists.apache.org/thread.html/re5eecbe5bf967439bafeeaa85987b3a43f0e6ef...
https://lists.apache.org/thread.html/rf26663f42e7f1a1d1cac732469fb5e92c89908a...
https://lists.apache.org/thread.html/rf992c5adf376294af31378a70aa8a158388a41d...
https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
SUSE http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00002.html

Alert History

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Date Informations
2020-07-24 05:22:46
  • Multiple Updates
2020-07-15 09:23:02
  • Multiple Updates
2020-06-28 17:22:41
  • Multiple Updates
2020-06-26 09:22:44
  • Multiple Updates
2020-05-29 05:22:48
  • Multiple Updates
2020-05-23 13:03:15
  • Multiple Updates
2020-05-23 02:36:02
  • First insertion