USN-4898-1: curl vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Description

Viktor Szakats discovered that curl did not strip off user credentials from referrer header fields. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2021-22876)

Mingtao Yang discovered that curl incorrectly handled session tickets when using an HTTPS proxy. A remote attacker in control of an HTTPS proxy could use this issue to bypass certificate checks and intercept communications. This issue only affected Ubuntu 20.04 LTS and Ubuntu 20.10. (CVE-2021-22890)

CVEs contained in this USN include: CVE-2021-22890, CVE-2021-22876.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs3
  • All versions prior to 0.233.0
• Xenial Stemcells
  • 456.x versions prior to 456.158
  • 621.x versions prior to 621.123
  • All other stemcells not listed.
• CF Deployment
  • All versions prior to 16.13.0

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

• cflinuxfs3
  • Upgrade all versions to 0.233.0 or greater
• Xenial Stemcells
  • Upgrade 456.x versions to 456.158 or greater
  • Upgrade 621.x versions to 621.123 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • Upgrade all versions to 16.13.0 or greater

History

2021-04-29: Initial vulnerability report published.