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Security Advisory

USN-6535-1: curl vulnerabilities

USN-6535-1: curl vulnerabilities




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 22.04


Harry Sintonen discovered that curl incorrectly handled mixed case cookie domains. A remote attacker could possibly use this issue to set cookies that get sent to different and unrelated sites and domains. (CVE-2023-46218) Maksymilian Arciemowicz discovered that curl incorrectly handled long file names when saving HSTS data. This could result in curl losing HSTS data, and subsequent requests to a site would be done without it, contrary to expectations. This issue only affected Ubuntu 23.04 and Ubuntu 23.10. (CVE-2023-46219) Update Instructions: Run `sudo pro fix USN-6535-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libcurl4-gnutls-dev – 7.68.0-1ubuntu2.21 libcurl4-openssl-dev – 7.68.0-1ubuntu2.21 libcurl3-gnutls – 7.68.0-1ubuntu2.21 libcurl4-doc – 7.68.0-1ubuntu2.21 libcurl3-nss – 7.68.0-1ubuntu2.21 libcurl4-nss-dev – 7.68.0-1ubuntu2.21 libcurl4 – 7.68.0-1ubuntu2.21 curl – 7.68.0-1ubuntu2.21 No subscription required

CVEs contained in this USN include: CVE-2023-46218, CVE-2023-46219.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • cflinuxfs4
    • All versions prior to 1.56.0
  • Jammy Stemcells
    • 1.x versions prior to 1.327
    • All other stemcells not listed.
  • CF Deployment
    • All versions with Jammy Stemcells prior to 1.327


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

The Cloud Foundry project recommends upgrading the following releases:

  • cflinuxfs4
    • Upgrade all versions to 1.56.0 or greater
  • Jammy Stemcells
    • Upgrade 1.x versions to 1.327 or greater
    • All other stemcells should be upgraded to the latest version available on
  • CF Deployment
    • For all versions, upgrade Jammy Stemcells to 1.327 or greater


2024-03-18: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR