Security is a fundamental goal of the OpenStack architecture and needs to be addressed at all layers of the stack. Like any complex, evolving system security has to be vigilantly pursued, and exposures eliminated. We need your help.
OpenStack has two mechanisms for communicating security information with downstream stakeholders, “Advisories” and “Notes”. OpenStack Security Advisories (OSSA) are created to deal with severe security issues in OpenStack for which a fix is available - OSSA’s are issued by the OpenStack Vulnerability Management Team (VMT). OpenStack Security Notes (OSSN) are used for security issues which do not qualify for an advisory, typically design issues, deployment and configuration vulnerabilities.
How to report security issues to OpenStack¶
If you think you’ve identified a vulnerability, please work with us to rectify and disclose the issue responsibly. We provide two ways to report issues to the OpenStack Vulnerability Management Team depending on how sensitive the issue is:
Check the project’s documentation to determine where it receives bug reports. If on https://storyboard.openstack.org/ then log in and create a new story, making sure to check both the Private and Vulnerability or Security-related checkboxes, and selecting the relevant project for the initial task before saving. If on https://bugs.launchpad.net/ then find the project there, log in click the ‘Report a bug’ link at the right, fill in the ‘Summary’ and ‘Further information’ fields describing the issue, then click the ‘This bug is a security vulnerability’ checkbox near the bottom of the page before submitting it. This will make the bug Private and only accessible to the Vulnerability Management Team.
If the issue is extremely sensitive or you’re otherwise unable to use the bug tracker directly, please send an E-mail message to one or more of the Vulnerability Management Team’s members. You’re encouraged to encrypt messages to their OpenPGP keys.
All private reports of suspected vulnerabilities are embargoed for a maximum of 90 days. Unless unusual circumstances arise, any defect reported in private will be made public within 90 calendar days from when it is received, even if a solution has not been identified.
Vulnerability Management Team¶
An autonomous subgroup of vulnerability management specialists with in the security team make up the OpenStack vulnerability management team (VMT). Their job is facilitating the reporting of vulnerabilities, coordinating security fixes and handling progressive disclosure of the vulnerability information. Specifically, they are responsible for the following functions:
Vulnerability Management: All vulnerabilities discovered by community members (or users) can be reported to the Team.
Vulnerability Tracking: The Team will curate a set of vulnerability related issues in the issue tracker. Some of these issues will be private to the Team and the affected product leads, but once remediated, all vulnerabilities will be public.
Coordinated Disclosure: As part of our commitment to work with the security community, the Team will ensure that proper credit is given to security researchers who responsibly report issues in OpenStack.
To directly reach members of the VMT, contact them at the following addresses (optionally encrypted for the indicated OpenPGP keys):
See Vulnerability Management Process for details on our open process.
Security information for OpenStack deployers¶
There are four main sources of security guidance for OpenStack deployers:
OpenStack Security Advisories (OSSA)
OpenStack Security Notes (OSSN)
OpenStack Security Guide
OpenStack Security Advisories (OSSA)¶
- OSSA-2023-003: Unauthorized volume access through deleted volume attachments
- OSSA-2023-002: Arbitrary file access through custom VMDK flat descriptor
- OSSA-2023-001: Arbitrary file access through custom S3 XML entities
- OSSA-2021-006: Routes middleware memory leak for nonexistent controllers
- OSSA-2021-005: Arbitrary dnsmasq reconfiguration via extra_dhcp_opts
You can find the complete list of published advisories here:
OpenStack Security Notes¶
Security Notes advise users of security related issues. Security notes are similar to advisories; they often address vulnerabilities in third party tools typically used within OpenStack deployments and provide guidance on common configuration mistakes that can result in an insecure operating environment.
The complete set of security notes is available online, but they are also published on the OpenStack mailing list when they are released.
OpenStack Security Guide¶
The OpenStack Security Guide provides best practice information for OpenStack deployers. This guide was written by a community of security experts from the OpenStack Security Project, based on experience gained while hardening OpenStack deployments. The guide covers topics including compute and storage hardening, rate limiting, compliance, and cryptography; it is the starting point for anyone looking to securely deploy OpenStack.
Read the guide online today.
Security information for OpenStack developers¶
How to propose and review a security patch¶
The patch development and review process for security patches is different from normal patches in OpenStack. Because the gerrit review process is public, all security bugs must have patches proposed to and reviewed in the StoryBoard or Launchpad report comments.
After a patch for the reported bug has been developed locally, you the patch author need to share that with the community. This is a simple process, but it is different than the normal OpenStack workflow.
Export it using the format-patch command:
git format-patch --stdout HEAD~1 >path/to/local/file.patch
Now you have the patch saved locally and you can attach it in a comment on the bug page.
For reviewers, to review that attached patch, run the following command:
git am <~path/to/local/file.patch
This applies the patch locally as a commit, including the commit message, author, date, and all other metadata. However, if the patch author did not use format-patch to export the patch (perhaps they only used git show >local.patch), then the patch can be applied locally with:
git apply path/to/local/file.patch
Secure development guidelines¶
The OpenStack security team have collaboratively developed this set of guidelines and best practices to help avoid common mistakes that lead to security vulnerabilities within the OpenStack platform.
- Apply Restrictive File Permissions
- Avoid dangerous file parsing and object serialization libraries
- Python Pipes to Avoid Shells
- Unvalidated URL redirect
- Use CSRF tokens to avoid CSRF attacks
- Escape user input to prevent XSS attacks
- Use secure channels for transmitting data
- Parameterize Database Queries
- Protect sensitive data in config files from disclosure
- Using Rootwrap in OpenStack
- Use Strong and Established Cryptographic Elements
- Use oslo rootwrap securely
- Use subprocess securely
- Restrict path access to prevent path traversal
- Create, use, and remove temporary files securely
- Validate certificates on HTTPS connections to avoid man-in-the-middle attacks