{"id":"USN-5079-4","aliases":[],"status":"published","title":"curl regression","description":"USN-5079-2 fixed vulnerabilities in curl. One of the fixes introduced a\nregression. This update fixes the problem.\n\nOriginal advisory details:\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":"2021-09-21T13:07:33Z","modified":"2026-06-29T13:49:31Z","fixes":[{"ecosystem":"Ubuntu:Pro:14.04:LTS","package":"curl","fixed_in":["7.35.0-1ubuntu2.20+esm9"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"curl","fixed_in":["7.47.0-1ubuntu2.19+esm2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.35.0-1ubuntu2.20+esm9"}]}],"versions":["7.32.0-1ubuntu1","7.33.0-1ubuntu1","7.34.0-1ubuntu1","7.35.0-1ubuntu1","7.35.0-1ubuntu2","7.35.0-1ubuntu2.1","7.35.0-1ubuntu2.2","7.35.0-1ubuntu2.3","7.35.0-1ubuntu2.5","7.35.0-1ubuntu2.6","7.35.0-1ubuntu2.7","7.35.0-1ubuntu2.8","7.35.0-1ubuntu2.9","7.35.0-1ubuntu2.10","7.35.0-1ubuntu2.11","7.35.0-1ubuntu2.12","7.35.0-1ubuntu2.13","7.35.0-1ubuntu2.14","7.35.0-1ubuntu2.15","7.35.0-1ubuntu2.16","7.35.0-1ubuntu2.17","7.35.0-1ubuntu2.19","7.35.0-1ubuntu2.20","7.35.0-1ubuntu2.20+esm2","7.35.0-1ubuntu2.20+esm3","7.35.0-1ubuntu2.20+esm4","7.35.0-1ubuntu2.20+esm5","7.35.0-1ubuntu2.20+esm6","7.35.0-1ubuntu2.20+esm7","7.35.0-1ubuntu2.20+esm8"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.47.0-1ubuntu2.19+esm2"}]}],"versions":["7.43.0-1ubuntu2","7.45.0-1ubuntu1","7.46.0-1ubuntu1","7.47.0-1ubuntu1","7.47.0-1ubuntu2","7.47.0-1ubuntu2.1","7.47.0-1ubuntu2.2","7.47.0-1ubuntu2.3","7.47.0-1ubuntu2.4","7.47.0-1ubuntu2.5","7.47.0-1ubuntu2.6","7.47.0-1ubuntu2.7","7.47.0-1ubuntu2.8","7.47.0-1ubuntu2.9","7.47.0-1ubuntu2.11","7.47.0-1ubuntu2.12","7.47.0-1ubuntu2.13","7.47.0-1ubuntu2.14","7.47.0-1ubuntu2.15","7.47.0-1ubuntu2.16","7.47.0-1ubuntu2.18","7.47.0-1ubuntu2.19","7.47.0-1ubuntu2.19+esm1"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-5079-4","tags":["advisory"]},{"url":"https://launchpad.net/bugs/1944120","tags":["report"]}],"sources":{"osv":[{"id":"USN-5079-4","title":"curl regression","description":"USN-5079-2 fixed vulnerabilities in curl. One of the fixes introduced a\nregression. This update fixes the problem.\n\nOriginal advisory details:\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":"2021-09-21T13:07:33Z","modified":"2026-06-29T13:49:31.976073874Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}