CVE-2020-1945: 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 syst

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MEDIUM 6.3WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2020-1945 is a medium-severity flaw (CVSS 6.3) affecting ant, ubuntu linux, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-668
Published	2020-05-14
Last modified	2026-06-17

Publisher (CNA): Apache Software Foundation · Vendor: apache · canonical · fedoraproject · opensuse · oracle

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-05-14 16:15 UTCPublished CVE record published
2026-06-17 03:02 UTCUpdated Record last modified

apache ant UPGRADE

Affected: >= 1.1 and <= 1.9.14 · >= 1.10.0 and <= 1.10.7

Fixed in: newer than 1.10.7

Safe to downgrade to: a release before 1.1

1. Check installed version

apt-cache policy ant || rpm -q ant || ant --version

2. UPGRADE to newer than 1.10.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ant

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ant

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison ant sudo apt install ant=<VERSION_BEFORE_1.1> sudo apt-mark hold ant

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ant sudo dnf downgrade ant-<VERSION_BEFORE_1.1> sudo dnf versionlock add ant

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

canonical ubuntu linux MITIGATE

Affected: 19.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 19.10

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

fedoraproject fedora MITIGATE

Affected: 31 · 32

Fixed in: no fixed release known

Safe to downgrade to: a release before 31

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

opensuse leap MITIGATE

Affected: 15.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.2

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

oracle agile engineering data management DOWNGRADE

Affected: 6.2.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.2.1.0

1. Check installed version

apt-cache policy agile-engineering-data-management || rpm -q agile-engineering-data-management || agile-engineering-data-management --version

2. No fixed release: DOWNGRADE to a release before 6.2.1.0 (Debian / Ubuntu)

apt-cache madison agile-engineering-data-management sudo apt install agile-engineering-data-management=<VERSION_BEFORE_6.2.1.0> sudo apt-mark hold agile-engineering-data-management

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list agile-engineering-data-management sudo dnf downgrade agile-engineering-data-management-<VERSION_BEFORE_6.2.1.0> sudo dnf versionlock add agile-engineering-data-management

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

oracle banking enterprise collections UPGRADE

Affected: >= 2.7.0 and <= 2.9.0

Fixed in: newer than 2.9.0

Safe to downgrade to: a release before 2.7.0

1. Check installed version

apt-cache policy banking-enterprise-collections || rpm -q banking-enterprise-collections || banking-enterprise-collections --version

2. UPGRADE to newer than 2.9.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade banking-enterprise-collections

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade banking-enterprise-collections

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.7.0 (Debian / Ubuntu)

apt-cache madison banking-enterprise-collections sudo apt install banking-enterprise-collections=<VERSION_BEFORE_2.7.0> sudo apt-mark hold banking-enterprise-collections

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list banking-enterprise-collections sudo dnf downgrade banking-enterprise-collections-<VERSION_BEFORE_2.7.0> sudo dnf versionlock add banking-enterprise-collections

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-1945?

ant: upgrade to newer than 1.10.7; ubuntu linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-1945 being exploited?

CVE-2020-1945 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-1945 affect?

CVE-2020-1945 affects ant, ubuntu linux, fedora. Severity is medium (CVSS 6.3). 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 cop

How urgent is CVE-2020-1945?

Priority 47/100. On your watchlist

Software pages

Java vulnerabilities · Ubuntu vulnerabilities

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References

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