QID 198501

Date Published: 2021-09-20

QID 198501: Ubuntu Security Notification for curl Vulnerabilities (USN-5079-1)

Curl incorrect handled memory when sending data to an mqtt server.
Curl incorrectly handled upgrades to tls.
Curl incorrectly handled responses received before starttls.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

a remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. (
Cve-2021-22945).
when receiving certain responses from servers, curl would continue without tls even when the option to require a successful upgrade to tls was specified. (
Cve-2021-22946).
A remote attacker could possibly use this issue to inject responses and intercept communications. (
Cve-2021-22947).

  • CVSS V3 rated as Medium - 4.2 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Refer to Ubuntu advisory: USN-5079-1 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 198501

    CVE-2021-22946 | CVE-2021-22947 | CVE-2021-22945 |
    Software Advisories
    Advisory ID Software Component Link
    USN-5079-1 Ubuntu Linux URL Logo ubuntu.com/security/notices/USN-5079-1
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