CVE-2020-7932: Omero web OMERO-web Sensitive Data Exposure Vulnerability

MODERATE
Advisory Identifier: GHSA-vwxv-frj6-fhc9
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CVSS 5.7
CWE-200
Published
Advisory Summary

CVE-2020-7932 is a MODERATE (CVSS 5.7) omero-web sensitive data exposure vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Omero web libraries in the PyPI ecosystem. The issue involves omero-web sensitive data exposure. Remediation is available by upgrading affected packages to version 5.6.3.

CVE-2020-7932 at a Glance

CVE Identifier CVE-2020-7932
GHSA Identifier GHSA-vwxv-frj6-fhc9
Severity MODERATE
CVSS v3.1 Base Score 5.7
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Omero web
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.7

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

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

How to Fix CVE-2020-7932

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

omero-web fixed: 5.6.3 
pip install omero-web>=5.6.3
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 omero-web

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2020-7932, inspect your installed packages using pip:

pip show omero-web

Analyze the terminal output to locate any version of Omero web in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.6.3), your application is affected.

Note: The pip show omero-web 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 Omero web, 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

OMERO.web before 5.6.3 optionally allows sensitive data elements (e.g., a session key) to be passed as URL query parameters. If an attacker tricks a user into clicking a malicious link in OMERO.web, the information in the query parameters may be exposed in the Referer header seen by the target. Information in the URL path such as object IDs may also be exposed.

CVE-2020-7932 Affected Omero web Versions

1 component(s)
Fixed Versions:
5.6.3
Product / Package Ecosystem Affected Versions Fixed Version
omero-web
pypi/omero-web
PyPI
< 5.6.3
5.6.3

References

NVD — CVE-2020-7932 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7932
Omero web Source Repository REPOSITORY
https://github.com/ome/omero-web
Omero web Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/omero-web/PYSEC-2020-244.yaml
Omero web Security Information SECURITY
https://www.openmicroscopy.org/security/advisories/2019-SV4

Frequently Asked Questions

What is CVE-2020-7932?
CVE-2020-7932 is a security vulnerability in Omero web involving OMERO-web Sensitive Data Exposure under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Omero web versions are affected?
Affected versions include releases prior to 5.6.3 across affected packages: omero-web.
What version fixes CVE-2020-7932?
Upgrading to 5.6.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is omero-web affected?
Yes, omero-web is affected in releases prior to 5.6.3. Upgrade your dependency to 5.6.3 or later.
What is the CVSS score of CVE-2020-7932?
CVE-2020-7932 has a CVSS v3.1 base score of 5.7 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2020-7932?
CVE-2020-7932 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-2020-7932?
Run the dependency tree command: 'pip show omero-web'. 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-vwxv-frj6-fhc9",
  "modified" : "2024-10-07T21:01:24Z",
  "published" : "2022-05-24T17:20:49Z",
  "aliases" : [ "CVE-2020-7932" ],
  "summary" : "OMERO-web Sensitive Data Exposure",
  "details" : "OMERO.web before 5.6.3 optionally allows sensitive data elements (e.g., a session key) to be passed as URL query parameters. If an attacker tricks a user into clicking a malicious link in OMERO.web, the information in the query parameters may be exposed in the Referer header seen by the target. Information in the URL path such as object IDs may also be exposed.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "omero-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.6.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7932"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ome/omero-web"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/omero-web/PYSEC-2020-244.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://www.openmicroscopy.org/security/advisories/2019-SV4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-13T19:44:40Z",
    "nvd_published_at" : "2020-06-17T17:15:00Z"
  }
}