The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5079-1 advisory.

    It was discovered that curl incorrect handled memory when sending data to an MQTT server. 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)

    Patrick Monnerat discovered that curl incorrectly handled upgrades to TLS. 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)

    Patrick Monnerat discovered that curl incorrectly handled responses received before STARTTLS. A remote     attacker could possibly use this issue to inject responses and intercept communications. (CVE-2021-22947)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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Ubuntu 18.04 LTS / 20.04 LTS : curl vulnerabilities (USN-5079-1)

critical Nessus Plugin ID 153407

Version 1.9