Vulnerabilities in pkg:pypi/os-vif

PACKAGE
Advisory Identifier: GHSA-mcpw-cp35-p3h8
Share
Advisory Summary

CVE-2019-15753 is a CRITICAL (CVSS 9.1) openstack os-vif ageing time of vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Os vif libraries in the PyPI ecosystem. The issue involves openstack os-vif ageing time of 0 disables linuxbridge mac learning. Remediation is available by upgrading affected packages to version 1.15.2, 1.17.0.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:pypi/os-vif

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:pypi/os-vif. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-mcpw-cp35-p3h8 CVE-2019-15753 CRITICAL OpenStack os-vif Ageing time of 0 disables linuxbridge MAC learning

CVE-2019-15753 at a Glance

CVE Identifier CVE-2019-15753
GHSA Identifier GHSA-mcpw-cp35-p3h8
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
Affected Product Os vif
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H).

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

How to Fix CVE-2019-15753

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

os-vif fixed: 1.15.2 
pip install os-vif>=1.15.2
os-vif fixed: 1.17.0 
pip install os-vif>=1.17.0
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 os-vif

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2019-15753, inspect your installed packages using pip:

pip show os-vif

Analyze the terminal output to locate any version of Os vif in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.15.2), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Os vif, 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

In OpenStack os-vif 1.15.x before 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0 disables MAC learning in linuxbridge, forcing obligatory Ethernet flooding of non-local destinations, which both impedes network performance and allows users to possibly view the content of packets for instances belonging to other tenants sharing the same network. Only deployments using the linuxbridge backend are affected. This occurs in PyRoute2.add() in `internal/command/ip/linux/impl_pyroute2.py`.

CVE-2019-15753 Affected Os vif Versions

2 component(s)
Fixed Versions:
1.15.21.17.0
Product / Package Ecosystem Affected Versions Fixed Version
os-vif
pypi/os-vif
PyPI
≥ 1.15.0
< 1.15.2
1.15.2
os-vif
pypi/os-vif
PyPI
≥ 1.16.0
< 1.17.0
All 1 versions
1.16.0
1.17.0

References

NVD — CVE-2019-15753 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-15753
Security Fix Commit FIX COMMIT
https://github.com/openstack/os-vif/commit/655c83d706f5de8a8cf23430782e065219297aef
Security Fix Commit FIX COMMIT
https://github.com/openstack/os-vif/commit/ec9d5430300c908ea9a1c64151eee7af522a44e7
Os vif Source Repository REPOSITORY
https://github.com/openstack/os-vif
launchpad.net/bugs/1837252 WEB
https://launchpad.net/bugs/1837252
review.opendev.org/672834 WEB
https://review.opendev.org/672834
review.opendev.org/678098 WEB
https://review.opendev.org/678098
Os vif Security Information SECURITY
https://security.openstack.org/ossa/OSSA-2019-004.html
Os vif Security Information SECURITY
http://www.openwall.com/lists/oss-security/2019/08/29/2

Frequently Asked Questions

What is CVE-2019-15753?
CVE-2019-15753 is a security vulnerability in Os vif involving OpenStack os-vif Ageing time of 0 disables linuxbridge MAC learning under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Os vif versions are affected?
Affected versions include releases prior to 1.15.2, 1.17.0 across affected packages: os-vif.
What version fixes CVE-2019-15753?
Upgrading to 1.15.2, 1.17.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is os-vif affected?
Yes, os-vif is affected in releases prior to 1.15.2, 1.17.0. Upgrade your dependency to 1.15.2, 1.17.0 or later.
What is the CVSS score of CVE-2019-15753?
CVE-2019-15753 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
What CWE is associated with CVE-2019-15753?
CVE-2019-15753 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check PyPI dependencies for CVE-2019-15753?
Run the dependency tree command: 'pip show os-vif'. 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-mcpw-cp35-p3h8",
  "modified" : "2024-05-02T13:11:32Z",
  "published" : "2022-05-24T16:55:04Z",
  "aliases" : [ "CVE-2019-15753" ],
  "summary" : "OpenStack os-vif Ageing time of 0 disables linuxbridge MAC learning",
  "details" : "In OpenStack os-vif 1.15.x before 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0 disables MAC learning in linuxbridge, forcing obligatory Ethernet flooding of non-local destinations, which both impedes network performance and allows users to possibly view the content of packets for instances belonging to other tenants sharing the same network. Only deployments using the linuxbridge backend are affected. This occurs in PyRoute2.add() in `internal/command/ip/linux/impl_pyroute2.py`.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "os-vif"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.15.0"
      }, {
        "fixed" : "1.15.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "os-vif"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.16.0"
      }, {
        "fixed" : "1.17.0"
      } ]
    } ],
    "versions" : [ "1.16.0" ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-15753"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openstack/os-vif/commit/655c83d706f5de8a8cf23430782e065219297aef"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openstack/os-vif/commit/ec9d5430300c908ea9a1c64151eee7af522a44e7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openstack/os-vif"
  }, {
    "type" : "WEB",
    "url" : "https://launchpad.net/bugs/1837252"
  }, {
    "type" : "WEB",
    "url" : "https://review.opendev.org/672834"
  }, {
    "type" : "WEB",
    "url" : "https://review.opendev.org/678098"
  }, {
    "type" : "WEB",
    "url" : "https://security.openstack.org/ossa/OSSA-2019-004.html"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2019/08/29/2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-05-02T13:11:32Z",
    "nvd_published_at" : "2019-08-28T21:15:00Z"
  }
}