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CURL SECURITY FOR DEVELOPERS

This document is intended to provide guidance to curl developers on how
security vulnerabilities should be handled.

PUBLISHING INFORMATION

All known and public curl or libcurl related vulnerabilities are listed at
http://curl.haxx.se/docs/security.html

Security vulnerabilities should not be entered in the project's public bug
tracker unless the necessary configuration is in place to limit access to the
issue to only the reporter and the project's security team.

VULNERABILITY HANDLING

The typical process for handling a new security vulnerability is as follows.

No information should be made public about a vulnerability until it is
formally announced at the end of this process. That means, for example that a
bug tracker entry must NOT be created to track the issue since that will make
the issue public and it should not be discussed on any of the project's public
mailing lists. Also messages associated with any commits should not make
any reference to the security nature of the commit if done prior to the public
announcement.

- The person discovering the issue, the reporter, reports the vulnerability
  privately to curl-security@haxx.se. That's an email alias that reaches a
  handful of selected and trusted people.

- Messages that do not relate to the reporting or managing of an undisclosed
  security vulnerability in curl or libcurl are ignored and no further action
  is required.

- A person in the security team sends an e-mail to the original reporter to
  acknowledge the report.

- The security team investigates the report and either rejects it or accepts
  it.

- If the report is rejected, the team writes to the reporter to explain why.

- If the report is accepted, the team writes to the reporter to let him/her
  know it is accepted and that they are working on a fix.

- The security team discusses the problem, works out a fix, considers the
  impact of the problem and suggests a release schedule. This discussion
  should involve the reporter as much as possible.

- The release of the information should be "as soon as possible" and is most
  often synced with an upcoming release that contains the fix. If the
  reporter, or anyone else, thinks the next planned release is too far away
  then a separate earlier release for security reasons should be considered.

- Write a security advisory draft about the problem that explains what the
  problem is, its impact, which versions it affects, solutions or
  work-arounds, when the release is out and make sure to credit all
  contributors properly.

- Request a CVE number from distros@openwall.org[1] when also informing and
  preparing them for the upcoming public security vulnerability announcement -
  attach the advisory draft for information. Note that 'distros' won't accept
  an embargo longer than 19 days.

- Update the "security advisory" with the CVE number.

- The security team commits the fix in a private branch. The commit message
  should ideally contain the CVE number. This fix is usually also distributed
  to the 'distros' mailing list to allow them to use the fix prior to the
  public announcement.

- At the day of the next release, the private branch is merged into the master
  branch and pushed. Once pushed, the information is accessible to the public
  and the actual release should follow suit immediately afterwards.

- The project team creates a release that includes the fix.

- The project team announces the release and the vulnerability to the world in
  the same manner we always announce releases. It gets sent to the
  curl-announce, curl-library and curl-users mailing lists.

- The security web page on the web site should get the new vulernability
  mentioned.

[1] = http://oss-security.openwall.org/wiki/mailing-lists/distros
