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Security Advisory

USN-6429-1: curl vulnerabilities




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 22.04


Jay Satiro discovered that curl incorrectly handled hostnames when using a SOCKS5 proxy. In environments where curl is configured to use a SOCKS5 proxy, a remote attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-38545) It was discovered that curl incorrectly handled cookies when an application duplicated certain handles. A local attacker could possibly create a cookie file and inject arbitrary cookies into subsequent connections. (CVE-2023-38546) Update Instructions: Run `sudo pro fix USN-6429-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libcurl4-gnutls-dev – 7.68.0-1ubuntu2.20 libcurl4-openssl-dev – 7.68.0-1ubuntu2.20 libcurl3-gnutls – 7.68.0-1ubuntu2.20 libcurl4-doc – 7.68.0-1ubuntu2.20 libcurl3-nss – 7.68.0-1ubuntu2.20 libcurl4-nss-dev – 7.68.0-1ubuntu2.20 libcurl4 – 7.68.0-1ubuntu2.20 curl – 7.68.0-1ubuntu2.20 No subscription required

CVEs contained in this USN include: CVE-2023-38545, CVE-2023-38546.

Affected Cloud Foundry Products and Versions

Severity is high unless otherwise noted.

  • cflinuxfs4
    • All versions prior to 1.44.0
  • Jammy Stemcells
    • 1.x versions prior to 1.260
    • All other stemcells not listed.
  • CF Deployment
    • All versions with Jammy Stemcells prior to 1.260


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 1.44.0 or greater
  • Jammy Stemcells
    • Upgrade 1.x versions to 1.260 or greater
    • All other stemcells should be upgraded to the latest version available on
  • CF Deployment
    • For all versions, upgrade Jammy Stemcells to 1.260 or greater


2023-11-09: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR