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CVE-2021-2341

Publication date 21 July 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

3.1 · Low

Score breakdown

Vulnerability in the Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Java SE: 7u301, 8u291, 11.0.11, 16.0.1; Oracle GraalVM Enterprise Edition: 20.3.2 and 21.1.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Oracle GraalVM Enterprise Edition. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Java SE, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 3.1 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N).

From the Ubuntu Security Team

Varnavas Papaioannou discovered that the FTP client implementation in OpenJDK accepted alternate server IP addresses when connecting with FTP passive mode. An attacker controlling an FTP server that an application connects to could possibly use this to expose sensitive information (rudimentary port scans).

Read the notes from the security team

Status

Package Ubuntu Release Status
icedtea-web 23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy Ignored end of life
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
openjdk-12 23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
openjdk-13 23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Ignored end of life
20.04 LTS focal Ignored superseded by openjdk-17
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
openjdk-15 23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
openjdk-8 23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Fixed 8u312-b07-0ubuntu1~21.04
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 8u312-b07-0ubuntu1~20.04
18.04 LTS bionic
Fixed 8u312-b07-0ubuntu1~18.04
16.04 LTS xenial
14.04 LTS trusty Not in release
openjdk-9 23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Ignored no longer supported by upstream
14.04 LTS trusty Not in release
openjdk-lts 23.04 lunar
Fixed 11.0.12+7-0ubuntu1
22.10 kinetic
Fixed 11.0.12+7-0ubuntu1
22.04 LTS jammy
Fixed 11.0.12+7-0ubuntu1
21.10 impish
Fixed 11.0.12+7-0ubuntu1
21.04 hirsute
Fixed 11.0.13+8-0ubuntu1~21.04
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 11.0.13+8-0ubuntu1~20.04
18.04 LTS bionic
Fixed 11.0.13+8-0ubuntu1~18.04
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

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Notes

sbeattie

the fix for this issue changes the FTP client behavior in OpenJDK. See the Oracle release notes on the new jdk.net.ftp.trustPasvAddress system property that can be set if this breaks PASV commands from an application using the FTP client implementation in OpenJDK.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
openjdk-8
openjdk-lts

Severity score breakdown

Parameter Value
Base score 3.1 · Low
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N