CVE-2020-1945: Ant Sensitive Data Exposure Vulnerability

MODERATE
Advisory Identifier: GHSA-4p6w-m9wc-c9c9
CVSS 6.3
CWE-668 CWE-200
Published
Advisory Summary

CVE-2020-1945 is a MODERATE (CVSS 6.3) sensitive data exposure vulnerability (CWE-668: Exposure of Resource to Wrong Sphere) affecting Ant libraries in the Maven ecosystem. The issue involves sensitive data exposure in apache ant. Remediation is available by upgrading affected packages to version 1.9.15, 1.10.8.

CVE-2020-1945 at a Glance

CVE Identifier CVE-2020-1945
GHSA Identifier GHSA-4p6w-m9wc-c9c9
Severity MODERATE
CVSS v3.1 Base Score 6.3
CWE Classification CWE-668: Exposure of Resource to Wrong Sphere
Affected Product Ant
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Local (AV:L)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2020-1945

To remediate this vulnerability, upgrade all affected Ant dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.apache.ant:ant fixed: 1.9.15
<dependency>
    <groupId>org.apache.ant</groupId>
    <artifactId>ant</artifactId>
    <version>1.9.15</version>
</dependency>
org.apache.ant:ant fixed: 1.10.8
<dependency>
    <groupId>org.apache.ant</groupId>
    <artifactId>ant</artifactId>
    <version>1.10.8</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

mvn dependency:tree -Dincludes=org.apache.ant

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2020-1945, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.ant

Analyze the terminal output to locate any version of Ant in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.9.15), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.ant command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-668: Exposure of Resource to Wrong Sphere, where the product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. In Ant, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2020-1945 Affected Ant Versions

2 component(s)
Fixed Versions:
1.9.151.10.8
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.ant:ant
Maven
≥ 1.1
< 1.9.15
1.9.15
org.apache.ant:ant
Maven
≥ 1.10.0
< 1.10.8
1.10.8

References

NVD — CVE-2020-1945 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-1945
lists.apache.org/thread.html/raaeddc... WEB
https://lists.apache.org/thread.html/raaeddc41da8f3afb1cb224876084a45f68e437a0afd9889a707e4b0c@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/rb86006... WEB
https://lists.apache.org/thread.html/rb860063819b9c0990e1fbce29d83f4554766fe5a05e3b3939736bf2b@%3Ccommits.myfaces.apache.org%3E
lists.apache.org/thread.html/rb8ec55... WEB
https://lists.apache.org/thread.html/rb8ec556f176c83547b959150e2108e2ddf1d61224295941908b0a81f@%3Cannounce.apache.org%3E
lists.apache.org/thread.html/rbfe9ba... WEB
https://lists.apache.org/thread.html/rbfe9ba28b74f39f46ec1bbbac3bef313f35017cf3aac13841a84483a@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/rc3c8ef... WEB
https://lists.apache.org/thread.html/rc3c8ef9724b5b1e171529b47f4b35cb7920edfb6e917fa21eb6c64ea@%3Cdev.ant.apache.org%3E
lists.apache.org/thread.html/rc89e49... WEB
https://lists.apache.org/thread.html/rc89e491b5b270fb40f1210b70554527b737c217ad2e831b643ead6bc@%3Cuser.ant.apache.org%3E
lists.apache.org/thread.html/rce0997... WEB
https://lists.apache.org/thread.html/rce099751721c26a8166d8b6578293820832831a0b2cb8d93b8efa081@%3Cnotifications.groovy.apache.org%3E
lists.apache.org/thread.html/rd7dda4... WEB
https://lists.apache.org/thread.html/rd7dda48ff835f4d0293949837d55541bfde3683bd35bd8431e324538@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/rda80ac... WEB
https://lists.apache.org/thread.html/rda80ac59119558eaec452e58ddfac2ccc9211da1c65f7927682c78b1@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/rdaa9c5... WEB
https://lists.apache.org/thread.html/rdaa9c51d5dc6560c9d2b3f3d742c768ad0705e154041e574a0fae45c@%3Cnotifications.groovy.apache.org%3E
lists.apache.org/thread.html/re1ce84... WEB
https://lists.apache.org/thread.html/re1ce84518d773a94a613d988771daf9252c9cf7375a9a477009f9735@%3Ccommits.creadur.apache.org%3E
lists.apache.org/thread.html/rf07fea... WEB
https://lists.apache.org/thread.html/rf07feaf78afc8f701e21948a06ef92565d3dff1242d710f4fbf900b2@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/rfd3466... WEB
https://lists.apache.org/thread.html/rfd346609527a79662c48b1da3ac500ec30f29f7ddaa3575051e81890@%3Ccommits.creadur.apache.org%3E
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EQBR65TINSJRN7PTPIVNYS33P535WM74
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RRVAWTCVXJMRYKQKEXYSNBF7NLSR6OEI
Ant Security Information SECURITY
https://security.gentoo.org/glsa/202007-34
usn.ubuntu.com/4380-1 WEB
https://usn.ubuntu.com/4380-1
Ant Security Information SECURITY
https://www.oracle.com//security-alerts/cpujul2021.html
Ant Security Information SECURITY
https://www.oracle.com/security-alerts/cpuApr2021.html
Ant Security Information SECURITY
https://www.oracle.com/security-alerts/cpujan2021.html
Ant Security Information SECURITY
https://www.oracle.com/security-alerts/cpujan2022.html
Ant Security Information SECURITY
https://www.oracle.com/security-alerts/cpujul2020.html
Ant Security Information SECURITY
https://www.oracle.com/security-alerts/cpuoct2020.html
Ant Security Information SECURITY
https://www.oracle.com/security-alerts/cpuoct2021.html
lists.apache.org/thread.html/r0d08a9... WEB
https://lists.apache.org/thread.html/r0d08a96ba9de8aa435f32944e8b2867c368a518d4ff57782e3637335@%3Cissues.hive.apache.org%3E
lists.apache.org/thread.html/r107ea1... WEB
https://lists.apache.org/thread.html/r107ea1b1a7a214bc72fe1a04207546ccef542146ae22952e1013b5cc@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/r1863b9... WEB
https://lists.apache.org/thread.html/r1863b9ce4c3e4b1e5b0c671ad05545ba3eb8399616aa746af5dfe1b1@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/r1a9c99... WEB
https://lists.apache.org/thread.html/r1a9c992d7c8219dc15b4ad448649f0ffdaa88d76ef6a0035c49455f5@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/r1b32c7... WEB
https://lists.apache.org/thread.html/r1b32c76afffcf676e13ed635a3332f3e46e6aaa7722eb3fc7a28f58e@%3Cdev.hive.apache.org%3E
lists.apache.org/thread.html/r1dc851... WEB
https://lists.apache.org/thread.html/r1dc8518dc99c42ecca5ff82d0d2de64cd5d3a4fa691eb9ee0304781e@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/r2306b6... WEB
https://lists.apache.org/thread.html/r2306b67f20c24942b872b0a41fbdc9330e8467388158bcd19c1094e0@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/r2704fb... WEB
https://lists.apache.org/thread.html/r2704fb14ce068c64759a986f81d5b5e42ab434fa13d0f444ad52816b@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/r3cea0f... WEB
https://lists.apache.org/thread.html/r3cea0f3da4f6d06d7afb6c0804da8e01773a0f50a09b8d9beb2cda65@%3Cissues.hive.apache.org%3E
lists.apache.org/thread.html/r4b2904... WEB
https://lists.apache.org/thread.html/r4b2904d64affd4266cd72ccb2fc3927c1c2f22009f183095aa46bf90@%3Cissues.hive.apache.org%3E
lists.apache.org/thread.html/r4ca33f... WEB
https://lists.apache.org/thread.html/r4ca33fad3fb39d130cda287d5a60727d9e706e6f2cf2339b95729490@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/r5dfc77... WEB
https://lists.apache.org/thread.html/r5dfc77048b1f9db26622dce91a6edf083d499397256594952fad5f35@%3Ccommits.myfaces.apache.org%3E
lists.apache.org/thread.html/r5e1cdd... WEB
https://lists.apache.org/thread.html/r5e1cdd79f019162f76414708b2092acad0a6703d666d72d717319305@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/r6030d3... WEB
https://lists.apache.org/thread.html/r6030d34ceacd0098538425c5dac8251ffc7fd90b886942bc7ef87858@%3Cnotifications.groovy.apache.org%3E
lists.apache.org/thread.html/r6970d1... WEB
https://lists.apache.org/thread.html/r6970d196cd73863dafdbc3a7052562deedd338e3bd7d73d8171d92d6@%3Ccommits.groovy.apache.org%3E
lists.apache.org/thread.html/r6e295d... WEB
https://lists.apache.org/thread.html/r6e295d792032ec02b32be3846c21a58857fba4a077d22c5842d69ba2@%3Ctorque-dev.db.apache.org%3E
lists.apache.org/thread.html/r6edd3e... WEB
https://lists.apache.org/thread.html/r6edd3e2cb79ee635630d891b54a4f1a9cd8c7f639d6ee34e75fbe830@%3Cissues.hive.apache.org%3E
lists.apache.org/thread.html/r815f88... WEB
https://lists.apache.org/thread.html/r815f88d1044760176f30a4913b4baacd06f3eae4eb662de7388e46d8@%3Cissues.hive.apache.org%3E
lists.apache.org/thread.html/r8e24ab... WEB
https://lists.apache.org/thread.html/r8e24abb7dd77cda14c6df90a377c94f0a413bbfcec90a29540ff8adf@%3Cissues.hive.apache.org%3E
lists.apache.org/thread.html/r8e592b... WEB
https://lists.apache.org/thread.html/r8e592bbfc016a5dbe2a8c0e81ff99682b9c78c453621b82c14e7b75e%40%3Cdev.ant.apache.org%3E
lists.apache.org/thread.html/r95dc94... WEB
https://lists.apache.org/thread.html/r95dc943e47a211d29df605e14f86c280fc9fa8d828b2b53bd07673c9@%3Cdev.creadur.apache.org%3E
lists.apache.org/thread.html/ra12c3e... WEB
https://lists.apache.org/thread.html/ra12c3e23b021f259a201648005b9946acd7f618a6f32301c97047967@%3Cannounce.apache.org%3E
lists.apache.org/thread.html/ra12c3e... WEB
https://lists.apache.org/thread.html/ra12c3e23b021f259a201648005b9946acd7f618a6f32301c97047967@%3Cdev.groovy.apache.org%3E
lists.apache.org/thread.html/ra12c3e... WEB
https://lists.apache.org/thread.html/ra12c3e23b021f259a201648005b9946acd7f618a6f32301c97047967@%3Cusers.groovy.apache.org%3E
lists.apache.org/thread.html/ra9dab3... WEB
https://lists.apache.org/thread.html/ra9dab34bf8625511f23692ad0fcee2725f782e9aad6c5cdff6cf4465@%3Cnotifications.groovy.apache.org%3E
Ant Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00053.html
Ant Security Information SECURITY
http://www.openwall.com/lists/oss-security/2020/09/30/6
Ant Security Information SECURITY
http://www.openwall.com/lists/oss-security/2020/12/06/1

Frequently Asked Questions

What is CVE-2020-1945?
CVE-2020-1945 is a security vulnerability in Ant involving Sensitive Data Exposure in Apache Ant under CWE-668: Exposure of Resource to Wrong Sphere.
Which Ant versions are affected?
Affected versions include releases prior to 1.9.15, 1.10.8 across affected packages: org.apache.ant:ant.
What version fixes CVE-2020-1945?
Upgrading to 1.9.15, 1.10.8 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ant affected?
Yes, org.apache.ant:ant is affected in releases prior to 1.9.15, 1.10.8. Upgrade your dependency to 1.9.15, 1.10.8 or later.
What is the CVSS score of CVE-2020-1945?
CVE-2020-1945 has a CVSS v3.1 base score of 6.3 (MODERATE) with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2020-1945?
CVE-2020-1945 is classified under CWE-668: Exposure of Resource to Wrong Sphere (The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.).
How can I check Maven dependencies for CVE-2020-1945?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.ant'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4p6w-m9wc-c9c9",
  "modified" : "2022-02-08T22:06:02Z",
  "published" : "2020-09-14T18:13:29Z",
  "aliases" : [ "CVE-2020-1945" ],
  "summary" : "Sensitive Data Exposure in Apache Ant",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.ant:ant"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.1"
      }, {
        "fixed" : "1.9.15"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.ant:ant"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.10.0"
      }, {
        "fixed" : "1.10.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-1945"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/raaeddc41da8f3afb1cb224876084a45f68e437a0afd9889a707e4b0c@%3Cdev.creadur.apache.org%3E"
  }, {
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  }, {
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  }, {
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    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RRVAWTCVXJMRYKQKEXYSNBF7NLSR6OEI"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/202007-34"
  }, {
    "type" : "WEB",
    "url" : "https://usn.ubuntu.com/4380-1"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com//security-alerts/cpujul2021.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpuApr2021.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpujan2021.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpujan2022.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpujul2020.html"
  }, {
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    "url" : "https://www.oracle.com/security-alerts/cpuoct2020.html"
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    "url" : "https://www.oracle.com/security-alerts/cpuoct2021.html"
  }, {
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  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-668" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-09-14T18:12:46Z",
    "nvd_published_at" : "2020-05-14T16:15:00Z"
  }
}