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Security Advisory

USN-6718-1: curl vulnerabilities

USN-6718-1: curl vulnerabilities




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 22.04


Dan Fandrich discovered that curl would incorrectly use the default set of protocols when a parameter option disabled all protocols without adding any, contrary to expectations. This issue only affected Ubuntu 23.10. (CVE-2024-2004) It was discovered that curl incorrectly handled memory when limiting the amount of headers when HTTP/2 server push is allowed. A remote attacker could possibly use this issue to cause curl to consume resources, leading to a denial of service. (CVE-2024-2398) Update Instructions: Run `sudo pro fix USN-6718-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: curl – 7.68.0-1ubuntu2.22 libcurl3-gnutls – 7.68.0-1ubuntu2.22 libcurl3-nss – 7.68.0-1ubuntu2.22 libcurl4 – 7.68.0-1ubuntu2.22 libcurl4-doc – 7.68.0-1ubuntu2.22 libcurl4-gnutls-dev – 7.68.0-1ubuntu2.22 libcurl4-nss-dev – 7.68.0-1ubuntu2.22 libcurl4-openssl-dev – 7.68.0-1ubuntu2.22 No subscription required

CVEs contained in this USN include: CVE-2024-2398, CVE-2024-2004.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • cflinuxfs4
    • All versions prior to 1.84.0
  • Jammy Stemcells
    • 1.x versions prior to 1.423
    • All other stemcells not listed.
  • CF Deployment
    • All versions with Jammy Stemcells prior to 1.423


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 1.84.0 or greater
  • Jammy Stemcells
    • Upgrade 1.x versions to 1.423 or greater
    • All other stemcells should be upgraded to the latest version available on
  • CF Deployment
    • For all versions, upgrade Jammy Stemcells to 1.423 or greater


2024-05-02: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR