UBUNTU-CVE-2020-1938

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Source
https://ubuntu.com/security/CVE-2020-1938
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-1938.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-1938
Related
Published
2020-02-24T22:15:00Z
Modified
2020-02-24T22:15:00Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:Pro:14.04:LTS / tomcat7

Package

Name
tomcat7
Purl
pkg:deb/ubuntu/tomcat7?arch=src?distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.0.42-1
7.0.47-1
7.0.50-1
7.0.52-1
7.0.52-1ubuntu0.1
7.0.52-1ubuntu0.3
7.0.52-1ubuntu0.6
7.0.52-1ubuntu0.7
7.0.52-1ubuntu0.8
7.0.52-1ubuntu0.9
7.0.52-1ubuntu0.10
7.0.52-1ubuntu0.11
7.0.52-1ubuntu0.13
7.0.52-1ubuntu0.14
7.0.52-1ubuntu0.15
7.0.52-1ubuntu0.16
7.0.52-1ubuntu0.16+esm1

Ecosystem specific 

{
    "ubuntu_priority": "low"
}

Ubuntu:Pro:16.04:LTS / tomcat8

Package

Name
tomcat8
Purl
pkg:deb/ubuntu/tomcat8?arch=src?distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

8.*

8.0.26-1
8.0.28-1
8.0.30-1
8.0.32-1
8.0.32-1ubuntu1
8.0.32-1ubuntu1.1
8.0.32-1ubuntu1.2
8.0.32-1ubuntu1.3
8.0.32-1ubuntu1.4
8.0.32-1ubuntu1.5
8.0.32-1ubuntu1.6
8.0.32-1ubuntu1.7
8.0.32-1ubuntu1.8
8.0.32-1ubuntu1.9
8.0.32-1ubuntu1.10
8.0.32-1ubuntu1.11
8.0.32-1ubuntu1.13
8.0.32-1ubuntu1.13+esm1

Ecosystem specific 

{
    "ubuntu_priority": "low"
}

Ubuntu:Pro:16.04:LTS / tomcat7

Package

Name
tomcat7
Purl
pkg:deb/ubuntu/tomcat7?arch=src?distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.0.64-1
7.0.68-1
7.0.68-1ubuntu0.1
7.0.68-1ubuntu0.3
7.0.68-1ubuntu0.4
7.0.68-1ubuntu0.4+esm1
7.0.68-1ubuntu0.4+esm2

Ecosystem specific 

{
    "ubuntu_priority": "low"
}

Ubuntu:Pro:18.04:LTS / tomcat7

Package

Name
tomcat7
Purl
pkg:deb/ubuntu/tomcat7?arch=src?distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.0.78-1
7.0.78-1ubuntu0.1~esm1

Ecosystem specific 

{
    "ubuntu_priority": "low"
}

Ubuntu:Pro:18.04:LTS / tomcat8

Package

Name
tomcat8
Purl
pkg:deb/ubuntu/tomcat8?arch=src?distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

8.*

8.5.21-1ubuntu1
8.5.29-1
8.5.30-1
8.5.30-1ubuntu1
8.5.30-1ubuntu1.2
8.5.30-1ubuntu1.3
8.5.30-1ubuntu1.4
8.5.39-1ubuntu1~18.04.1
8.5.39-1ubuntu1~18.04.2
8.5.39-1ubuntu1~18.04.3
8.5.39-1ubuntu1~18.04.3+esm1
8.5.39-1ubuntu1~18.04.3+esm2

Ecosystem specific 

{
    "ubuntu_priority": "low"
}

Ubuntu:Pro:18.04:LTS / tomcat9

Package

Name
tomcat9
Purl
pkg:deb/ubuntu/tomcat9?arch=src?distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.0.16-3~18.04.1
9.0.16-3ubuntu0.18.04.1
9.0.16-3ubuntu0.18.04.2
9.0.16-3ubuntu0.18.04.2+esm1
9.0.16-3ubuntu0.18.04.2+esm2

Ecosystem specific 

{
    "ubuntu_priority": "low"
}

Ubuntu:20.04:LTS / tomcat9

Package

Name
tomcat9
Purl
pkg:deb/ubuntu/tomcat9?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
9.0.31-1

Affected versions

9.*

9.0.24-1
9.0.27-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "binary_version": "9.0.31-1",
            "binary_name": "libtomcat9-embed-java"
        },
        {
            "binary_version": "9.0.31-1",
            "binary_name": "libtomcat9-java"
        },
        {
            "binary_version": "9.0.31-1",
            "binary_name": "tomcat9"
        },
        {
            "binary_version": "9.0.31-1",
            "binary_name": "tomcat9-admin"
        },
        {
            "binary_version": "9.0.31-1",
            "binary_name": "tomcat9-common"
        },
        {
            "binary_version": "9.0.31-1",
            "binary_name": "tomcat9-docs"
        },
        {
            "binary_version": "9.0.31-1",
            "binary_name": "tomcat9-examples"
        },
        {
            "binary_version": "9.0.31-1",
            "binary_name": "tomcat9-user"
        }
    ]
}