CVE-2021-36373: When reading a specially crafted TAR archive an Apache Ant build can be made to allocate large amounts of memo

This month

MEDIUM 5.5WATCHLISTUPGRADEDOWNGRADEDOWNGRADE

CVE-2021-36373 is a medium-severity flaw (CVSS 5.5) affecting ant, agile product lifecycle management, banking trade finance. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When reading a specially crafted TAR archive an Apache Ant build can be made to allocate large amounts of memory that finally leads to an out of memory error, even for small inputs. This can be used to disrupt builds using Apache Ant. Apache Ant prior to 1.9.16 and 1.10.11 were affected.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-130
Published	2021-07-14
Last modified	2026-08-25

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

Last updated 2026-08-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-07-14 07:15 UTCPublished CVE record published
2026-08-25 16:28 UTCUpdated Record last modified

apache ant UPGRADE

Affected: >= 1.9.0 and < 1.9.16 · >= 1.10.0 and < 1.10.11

Fixed in: 1.9.16, 1.10.11

Safe to downgrade to: a release before 1.9.0

1. Check installed version

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

2. UPGRADE to 1.9.16 (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 1.9.0 (Debian / Ubuntu)

apt-cache madison ant sudo apt install ant=<VERSION_BEFORE_1.9.0> 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_1.9.0> 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.

oracle agile product lifecycle management DOWNGRADE

Affected: 9.3.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.3.6

1. Check installed version

apt-cache policy agile-product-lifecycle-management || rpm -q agile-product-lifecycle-management || agile-product-lifecycle-management --version

2. No fixed release: DOWNGRADE to a release before 9.3.6 (Debian / Ubuntu)

apt-cache madison agile-product-lifecycle-management sudo apt install agile-product-lifecycle-management=<VERSION_BEFORE_9.3.6> sudo apt-mark hold agile-product-lifecycle-management

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

dnf --showduplicates list agile-product-lifecycle-management sudo dnf downgrade agile-product-lifecycle-management-<VERSION_BEFORE_9.3.6> sudo dnf versionlock add agile-product-lifecycle-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 trade finance DOWNGRADE

Affected: 14.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 14.5

1. Check installed version

apt-cache policy banking-trade-finance || rpm -q banking-trade-finance || banking-trade-finance --version

2. No fixed release: DOWNGRADE to a release before 14.5 (Debian / Ubuntu)

apt-cache madison banking-trade-finance sudo apt install banking-trade-finance=<VERSION_BEFORE_14.5> sudo apt-mark hold banking-trade-finance

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

dnf --showduplicates list banking-trade-finance sudo dnf downgrade banking-trade-finance-<VERSION_BEFORE_14.5> sudo dnf versionlock add banking-trade-finance

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 treasury management DOWNGRADE

Affected: 14.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 14.5

1. Check installed version

apt-cache policy banking-treasury-management || rpm -q banking-treasury-management || banking-treasury-management --version

2. No fixed release: DOWNGRADE to a release before 14.5 (Debian / Ubuntu)

apt-cache madison banking-treasury-management sudo apt install banking-treasury-management=<VERSION_BEFORE_14.5> sudo apt-mark hold banking-treasury-management

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

dnf --showduplicates list banking-treasury-management sudo dnf downgrade banking-treasury-management-<VERSION_BEFORE_14.5> sudo dnf versionlock add banking-treasury-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 communications cloud native core automated test suite DOWNGRADE

Affected: 1.9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.9.0

1. Check installed version

apt-cache policy communications-cloud-native-core-automated-test-suite || rpm -q communications-cloud-native-core-automated-test-suite || communications-cloud-native-core-automated-test-suite --version

2. No fixed release: DOWNGRADE to a release before 1.9.0 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-automated-test-suite sudo apt install communications-cloud-native-core-automated-test-suite=<VERSION_BEFORE_1.9.0> sudo apt-mark hold communications-cloud-native-core-automated-test-suite

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

dnf --showduplicates list communications-cloud-native-core-automated-test-suite sudo dnf downgrade communications-cloud-native-core-automated-test-suite-<VERSION_BEFORE_1.9.0> sudo dnf versionlock add communications-cloud-native-core-automated-test-suite

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 communications cloud native core binding support function DOWNGRADE

Affected: 1.11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.11.0

1. Check installed version

apt-cache policy communications-cloud-native-core-binding-support-function || rpm -q communications-cloud-native-core-binding-support-function || communications-cloud-native-core-binding-support-function --version

2. No fixed release: DOWNGRADE to a release before 1.11.0 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-binding-support-function sudo apt install communications-cloud-native-core-binding-support-function=<VERSION_BEFORE_1.11.0> sudo apt-mark hold communications-cloud-native-core-binding-support-function

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

dnf --showduplicates list communications-cloud-native-core-binding-support-function sudo dnf downgrade communications-cloud-native-core-binding-support-function-<VERSION_BEFORE_1.11.0> sudo dnf versionlock add communications-cloud-native-core-binding-support-function

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-2021-36373?

ant: upgrade to 1.9.16, 1.10.11; agile product lifecycle management: downgrade or apply the listed mitigation; banking trade finance: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-36373 being exploited?

CVE-2021-36373 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-2021-36373 affect?

CVE-2021-36373 affects ant, agile product lifecycle management, banking trade finance. Severity is medium (CVSS 5.5). When reading a specially crafted TAR archive an Apache Ant build can be made to allocate large amounts of memory that finally leads to an out of memory error, even for small inputs. This can be used to disrupt builds using Apache Ant. Apach

How urgent is CVE-2021-36373?

Priority 45/100. On your watchlist

Related CVEs

CVE-2020-11979 HIGH 7.5 DOWNGRADE UPGRADE As mitigation for CVE-2020-1945 Apache Ant 1.10.8 changed the permissions of temporary files it created so tha
CVE-2021-36374 MEDIUM 5.5 UPGRADE DOWNGRADE When reading a specially crafted ZIP archive, or a derived formats, an Apache Ant build can be made to allocat
CVE-2020-1945 MEDIUM 6.3 UPGRADE MITIGATE 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

References

← Back to latest CVEs