CVE-2020-1945

Publication date 14 May 2020

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.3 · Medium

Score breakdown

Apache Ant 1.1 to 1.9.14 and 1.10.0 to 1.10.7 uses the default temporary directory identified by the Java system property java.io.tmpdir for several tasks and may thus leak sensitive information. The fixcrlf and replaceregexp tasks also copy files from the temporary directory back into the build tree allowing an attacker to inject modified source files into the build process.

From the Ubuntu Security Team

It was discovered that Apache Ant created temporary files with insecure permissions. An attacker could use this vulnerability to read sensitive information leaked into /tmp, or potentially inject malicious code into a project that is built with Apache Ant.

Read the notes from the security team

Mitigation

Set the java.io.tmpdir property of the JVM to point to a directory that is not world read/writable.

Status

Package Ubuntu Release Status
ant 24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
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
Not affected
20.04 LTS focal
19.10 eoan
Fixed 1.10.6-1ubuntu0.1
18.04 LTS bionic
16.04 LTS xenial
14.04 LTS trusty

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Notes

msalvatore

There are two potential mitigations for this vulnerability. 1) Set your umask to 077. 2) Set your JVM's java.io.tmpdir system property to a directory only readable and writable by the current user running Ant. The fix for this CVE is incomplete. CVE-2020-11979 finishes resolving the issue.

Severity score breakdown

Parameter Value
Base score 6.3 · Medium
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

References

Related Ubuntu Security Notices (USN)

Other references