CVE-2020-1739: Ansible Exposure Of Sensitive Information To Vulnerability

LOW
Advisory Identifier: GHSA-923p-fr2c-g5m2
Share
CVSS 3.9
CWE-200
Published
Advisory Summary

CVE-2020-1739 is a LOW (CVSS 3.9) exposure of sensitive information to vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Ansible libraries in the PyPI ecosystem. The issue involves exposure of sensitive information to an unauthorized actor in ansible. Remediation is available by upgrading affected packages to version 2.7.17, 2.8.11, 2.9.7.

CVE-2020-1739 at a Glance

CVE Identifier CVE-2020-1739
GHSA Identifier GHSA-923p-fr2c-g5m2
Severity LOW
CVSS v3.1 Base Score 3.9
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Ansible
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 3.9

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

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

How to Fix CVE-2020-1739

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

ansible fixed: 2.7.17 
pip install ansible>=2.7.17
ansible fixed: 2.8.11 
pip install ansible>=2.8.11
ansible fixed: 2.9.7 
pip install ansible>=2.9.7
Verify Direct and Transitive Dependencies

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

pip show ansible

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2020-1739, inspect your installed packages using pip:

pip show ansible

Analyze the terminal output to locate any version of Ansible in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.7.17), your application is affected.

Note: The pip show ansible command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Ansible, 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

A flaw was found in Ansible 2.7.16 and prior, 2.8.8 and prior, and 2.9.5 and prior when a password is set with the argument "password" of svn module, it is used on svn command line, disclosing to other users within the same node. An attacker could take advantage by reading the cmdline file from that particular PID on the procfs.

CVE-2020-1739 Affected Ansible Versions

3 component(s)
Fixed Versions:
2.7.172.8.112.9.7
Product / Package Ecosystem Affected Versions Fixed Version
ansible
pypi/ansible
PyPI
< 2.7.17
2.7.17
ansible
pypi/ansible
PyPI
≥ 2.8.0a1
< 2.8.11
2.8.11
ansible
pypi/ansible
PyPI
≥ 2.9.0a1
< 2.9.7
2.9.7

References

NVD — CVE-2020-1739 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-1739
Ansible Source Repository REPOSITORY
https://github.com/ansible/ansible/issues/67797
Ansible Source Repository REPOSITORY
https://github.com/ansible/ansible/pull/68911
Ansible Source Repository REPOSITORY
https://github.com/ansible/ansible/pull/68912
Ansible Source Repository REPOSITORY
https://github.com/ansible/ansible/pull/68913
Security Fix Commit FIX COMMIT
https://github.com/ansible/ansible/commit/1a89d4f059c21a818306a39ada7f5284ae125237
Security Fix Commit FIX COMMIT
https://github.com/ansible/ansible/commit/6c74a298702c8bb5532b9600073312e08f39680f
Security Fix Commit FIX COMMIT
https://github.com/ansible/ansible/commit/c6c4fbf4a1fdea1e10ba94462a60c413990a16a4
Ansible Security Information SECURITY
https://www.debian.org/security/2021/dsa-4950
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3IMV3XEIUXL6S4KPLYYM4TVJQ2VNEP2
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QT27K5ZRGDPCH7GT3DRI3LO4IVDVQUB7
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FWDK3QUVBULS3Q3PQTGEKUQYPSNOU5M3
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2020/05/msg00005.html
Ansible Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/ansible/PYSEC-2020-11.yaml
Ansible Source Repository REPOSITORY
https://github.com/ansible/ansible
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-923p-fr2c-g5m2
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1739

Frequently Asked Questions

What is CVE-2020-1739?
CVE-2020-1739 is a security vulnerability in Ansible involving Exposure of Sensitive Information to an Unauthorized Actor in Ansible under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Ansible versions are affected?
Affected versions include releases prior to 2.7.17, 2.8.11, 2.9.7 across affected packages: ansible.
What version fixes CVE-2020-1739?
Upgrading to 2.7.17, 2.8.11, 2.9.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ansible affected?
Yes, ansible is affected in releases prior to 2.7.17, 2.8.11, 2.9.7. Upgrade your dependency to 2.7.17, 2.8.11, 2.9.7 or later.
What is the CVSS score of CVE-2020-1739?
CVE-2020-1739 has a CVSS v3.1 base score of 3.9 (LOW) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2020-1739?
CVE-2020-1739 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check PyPI dependencies for CVE-2020-1739?
Run the dependency tree command: 'pip show ansible'. 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
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-923p-fr2c-g5m2",
  "modified" : "2024-09-06T17:53:58Z",
  "published" : "2021-04-07T20:30:44Z",
  "aliases" : [ "CVE-2020-1739" ],
  "summary" : "Exposure of Sensitive Information to an Unauthorized Actor in Ansible",
  "details" : "A flaw was found in Ansible 2.7.16 and prior, 2.8.8 and prior, and 2.9.5 and prior when a password is set with the argument \"password\" of svn module, it is used on svn command line, disclosing to other users within the same node. An attacker could take advantage by reading the cmdline file from that particular PID on the procfs.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "ansible"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.7.17"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "ansible"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.8.0a1"
      }, {
        "fixed" : "2.8.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "ansible"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.9.0a1"
      }, {
        "fixed" : "2.9.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-1739"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ansible/ansible/issues/67797"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ansible/ansible/pull/68911"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ansible/ansible/pull/68912"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ansible/ansible/pull/68913"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ansible/ansible/commit/1a89d4f059c21a818306a39ada7f5284ae125237"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ansible/ansible/commit/6c74a298702c8bb5532b9600073312e08f39680f"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ansible/ansible/commit/c6c4fbf4a1fdea1e10ba94462a60c413990a16a4"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2021/dsa-4950"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3IMV3XEIUXL6S4KPLYYM4TVJQ2VNEP2"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QT27K5ZRGDPCH7GT3DRI3LO4IVDVQUB7"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FWDK3QUVBULS3Q3PQTGEKUQYPSNOU5M3"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2020/05/msg00005.html"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/ansible/PYSEC-2020-11.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ansible/ansible"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-923p-fr2c-g5m2"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1739"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-05T18:45:25Z",
    "nvd_published_at" : "2020-03-12T18:15:00Z"
  }
}