Cloud Foundry Logo
blog single gear
Security Advisory

USN-4665-1: curl vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04

Description

Marc Aldorasi discovered that curl incorrectly handled the libcurl CURLOPT_CONNECT_ONLY option. This could result in data being sent to the wrong destination, possibly exposing sensitive information. This issue only affected Ubuntu 20.10. (CVE-2020-8231)

Varnavas Papaioannou discovered that curl incorrectly handled FTP PASV responses. An attacker could possibly use this issue to trick curl into connecting to an arbitrary IP address and be used to perform port scanner and other information gathering. (CVE-2020-8284)

It was discovered that curl incorrectly handled FTP wildcard matchins. A remote attacker could possibly use this issue to cause curl to consume resources and crash, resulting in a denial of service. (CVE-2020-8285)

It was discovered that curl incorrectly handled OCSP response verification. A remote attacker could possibly use this issue to provide a fraudulent OCSP response. (CVE-2020-8286)

CVEs contained in this USN include: CVE-2020-8231, CVE-2020-8286, CVE-2020-8285, CVE-2020-8284.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • cflinuxfs3
    • All versions prior to 0.213.0
  • Xenial Stemcells
    • 315.x versions prior to 315.204
    • 456.x versions prior to 456.131
    • 621.x versions prior to 621.95
    • All other stemcells not listed.
  • CF Deployment
    • All versions prior to 15.4.0

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 0.213.0 or greater
  • Xenial Stemcells
    • Upgrade 315.x versions to 315.204 or greater
    • Upgrade 456.x versions to 456.131 or greater
    • Upgrade 621.x versions to 621.95 or greater
    • All other stemcells should be upgraded to the latest version available onĀ bosh.io.
  • CF Deployment
    • Upgrade All versions to 15.4.0 or greater

History

2021-01-13: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR

SEE ALL ARTICLES