{"id":"USN-5079-3","aliases":[],"status":"published","title":"curl vulnerabilities","description":"USN-5079-1 fixed vulnerabilities in curl. One of the fixes introduced a\nregression on Ubuntu 18.04 LTS. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that curl incorrect handled memory when sending data to\n an MQTT server. A remote attacker could use this issue to cause curl to\n crash, resulting in a denial of service, or possibly execute arbitrary\n code. (CVE-2021-22945)\n \n Patrick Monnerat discovered that curl incorrectly handled upgrades to TLS.\n When receiving certain responses from servers, curl would continue without\n TLS even when the option to require a successful upgrade to TLS was\n specified. (CVE-2021-22946)\n \n Patrick Monnerat discovered that curl incorrectly handled responses\n received before STARTTLS. A remote attacker could possibly use this issue\n to inject responses and intercept communications. (CVE-2021-22947)","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2021-09-21T11:34:54Z","modified":"2026-04-22T10:17:47Z","fixes":[{"ecosystem":"Ubuntu:18.04:LTS","package":"curl","fixed_in":["7.58.0-2ubuntu3.16"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.58.0-2ubuntu3.16"}]}],"versions":["7.55.1-1ubuntu2","7.55.1-1ubuntu2.1","7.57.0-1ubuntu1","7.58.0-2ubuntu1","7.58.0-2ubuntu2","7.58.0-2ubuntu3","7.58.0-2ubuntu3.1","7.58.0-2ubuntu3.2","7.58.0-2ubuntu3.3","7.58.0-2ubuntu3.5","7.58.0-2ubuntu3.6","7.58.0-2ubuntu3.7","7.58.0-2ubuntu3.8","7.58.0-2ubuntu3.9","7.58.0-2ubuntu3.10","7.58.0-2ubuntu3.12","7.58.0-2ubuntu3.13","7.58.0-2ubuntu3.14","7.58.0-2ubuntu3.15"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-5079-3","tags":["advisory"]},{"url":"https://launchpad.net/bugs/1944120","tags":["report"]}],"sources":{"osv":[{"id":"USN-5079-3","title":"curl vulnerabilities","description":"USN-5079-1 fixed vulnerabilities in curl. One of the fixes introduced a\nregression on Ubuntu 18.04 LTS. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that curl incorrect handled memory when sending data to\n an MQTT server. A remote attacker could use this issue to cause curl to\n crash, resulting in a denial of service, or possibly execute arbitrary\n code. (CVE-2021-22945)\n \n Patrick Monnerat discovered that curl incorrectly handled upgrades to TLS.\n When receiving certain responses from servers, curl would continue without\n TLS even when the option to require a successful upgrade to TLS was\n specified. (CVE-2021-22946)\n \n Patrick Monnerat discovered that curl incorrectly handled responses\n received before STARTTLS. A remote attacker could possibly use this issue\n to inject responses and intercept communications. (CVE-2021-22947)\n","status":"published","published":"2021-09-21T11:34:54Z","modified":"2026-04-22T10:17:47.348549Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}