CVE-2021-2341

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

Show unmaintained releases

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	20.04 LTS focal	Ignored superseded by openjdk-17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	Fixed 8u312-b07-0ubuntu1~16.04 Ubuntu Pro
	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	Upstream: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/2464c9fe4c11
openjdk-lts	Upstream: http://hg.openjdk.java.net/jdk-updates/jdk11u/rev/ca23657dc7da

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

References

Related Ubuntu Security Notices (USN)

USN-5202-1
OpenJDK vulnerabilities
17 December 2021

Cvss 3 Severity Score