USN-5079-1

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USN-5079-1

Summary: curl vulnerabilities

Details: 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)

References: https://ubuntu.com/security/notices/USN-5079-1, https://ubuntu.com/security/CVE-2021-22945, https://ubuntu.com/security/CVE-2021-22946, https://ubuntu.com/security/CVE-2021-22947