Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 18.04
• Canonical Ubuntu 22.04

Description

Harry Sintonen discovered that curl incorrectly handled HSTS support when multiple URLs are requested serially. A remote attacker could possibly use this issue to cause curl to use unencrypted connections. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2023-23914) Harry Sintonen discovered that curl incorrectly handled HSTS support when multiple URLs are requested in parallel. A remote attacker could possibly use this issue to cause curl to use unencrypted connections. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2023-23915) Patrick Monnerat discovered that curl incorrectly handled memory when processing requests with multi-header compression. A remote attacker could possibly use this issue to cause curl to consume resources, leading to a denial of service. (CVE-2023-23916) Update Instructions: Run sudo pro fix USN-5891-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libcurl4-gnutls-dev – 7.81.0-1ubuntu1.8 libcurl4-openssl-dev – 7.81.0-1ubuntu1.8 libcurl3-gnutls – 7.81.0-1ubuntu1.8 libcurl4-doc – 7.81.0-1ubuntu1.8 libcurl3-nss – 7.81.0-1ubuntu1.8 libcurl4-nss-dev – 7.81.0-1ubuntu1.8 libcurl4 – 7.81.0-1ubuntu1.8 curl – 7.81.0-1ubuntu1.8 No subscription required

CVEs contained in this USN include: CVE-2023-23914, CVE-2023-23915, CVE-2023-23916.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.181
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.353.0
• cflinuxfs4
  • All versions prior to 0.66.0
• Jammy Stemcells
  • v1.x versions prior to 1.93
  • All other stemcells not listed.
• CF Deployment
  • All versions prior to 26.6.0, or later versions with Bionic Stemcells prior to 1.181 or Jammy Stemcells prior to 1.93

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below.

The Cloud Foundry project recommends upgrading the following releases:

• Bionic Stemcells
  • Upgrade 1.x versions to 1.181 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.353.0 or greater
• cflinuxfs4
  • Upgrade all versions to 0.66.0 or greater
• Jammy Stemcells
  • Upgrade v1.x versions to 1.93 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • Upgrade all versions to 26.6.0 or greater, upgrade Bionic Stemcells to 1.181 or greater, and upgrade Jammy Stemcells to 1.93 or greater

References

• USN Notice
• CVE-2023-23914
• CVE-2023-23915
• CVE-2023-23916

History

2023-04-20: Initial vulnerability report published.