CVE-2020-1945

Local data exposure via shared temporary directory

Published May 14, 2020 · Updated Aug 4, 2024

Information exposure in Apache Ant 1.1 through 1.9.14 and 1.10.0 through 1.10.7 allows local users to read temporary files. Several tasks use the shared java.io.tmpdir directory, while fixcrlf and replaceregexp copy files back into the build tree, allowing modified source injection. Access requires local execution alongside the Ant build and a temporary directory whose permissions permit interference.

CVSS severity6.3
Medium
EPSS probability1.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in Apache Ant 1.1 through 1.9.14 and 1.10.0 through 1.10.7 allows local users to read temporary files. Several tasks use the shared java.io.tmpdir directory, while fixcrlf and replaceregexp copy files back into the build tree, allowing modified source injection. Access requires local execution alongside the Ant build and a temporary directory whose permissions permit interference.

The record

CVE
CVE-2020-1945
Published
May 14, 2020
Updated
Aug 4, 2024
Vendor
The Apache Software Foundation
Product
Apache Ant
Classifications
CWE-377, T1195.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 14, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Apache Ant 1.1 to 1.9.14 and 1.10.0 to 1.10.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Antversion=Apache Ant 1.1 to 1.9.14 and 1.10.0 to 1.10.7

Published CVSS scores

6.3NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-377Insecure Temporary File
T1195.002Compromise Software Supply Chain

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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