{"id":"CVE-2021-33634","aliases":["EUVD-2021-20311","GHSA-5mrv-f9xf-hpqp","OESA-2023-1692"],"status":"published","title":"Malicious image running containers may cause DoS attacks","description":"iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.","severity":{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00214,"percentile":0.11809,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-665"],"published":"2023-09-28T11:06:08Z","modified":"2026-08-18T01:16:54Z","fixes":[{"ecosystem":"openEuler:20.03-LTS-SP1","package":"lcr","fixed_in":["2.0.5-20210518.110612.git5225bddc.oe1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP3","package":"lcr","fixed_in":["2.0.9-7.oe1"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS","package":"lcr","fixed_in":["2.1.2-5.oe2203sp2"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP1","package":"lcr","fixed_in":["2.0.9-7.oe2203sp1"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP2","package":"lcr","fixed_in":["2.1.2-5.oe2203sp2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP1","package":"lcr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.5-20210518.110612.git5225bddc.oe1"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP3","package":"lcr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.9-7.oe1"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS","package":"lcr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.2-5.oe2203sp2"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP1","package":"lcr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.9-7.oe2203sp1"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP2","package":"lcr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.2-5.oe2203sp2"}]}]}],"products":[{"vendor":"openeuler","product":"icr"},{"vendor":"openeuler","product":"lcr"}],"references":[{"url":"https://gitee.com/src-openeuler/lcr/pulls/251/files","tags":["x_transferred","Patch"]},{"url":"https://gitee.com/src-openeuler/lcr/pulls/257/files","tags":["x_transferred","Patch"]},{"url":"https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1692","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33634","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-5mrv-f9xf-hpqp"},{"url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1692","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-33634","title":"Malicious image running containers may cause DoS attacks","description":"iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.\n\n","status":"published","published":"2023-10-29T07:51:49.342Z","modified":"2024-09-09T14:22:28.992Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-665"],"updated_at":"2026-11-02T14:33:10.555814Z"}],"euvd":[{"id":"EUVD-2021-20311","description":"iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.\n\n","status":"published","published":"2023-10-29T07:51:49Z","modified":"2024-09-09T14:22:28Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:56:00.719005Z"}],"ghsa":[{"id":"GHSA-5mrv-f9xf-hpqp","title":"iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.\n\n","description":"iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.\n\n","status":"published","published":"2023-10-29T09:30:26Z","modified":"2023-11-16T05:04:26Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-665"],"updated_at":"2026-11-02T14:55:02.891904Z"}],"nvd":[{"id":"CVE-2021-33634","description":"iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.\n\n","status":"published","published":"2023-10-29T08:15:20.567Z","modified":"2026-06-17T03:54:54.447Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-665"],"updated_at":"2026-11-02T14:07:07.764332Z"}],"osv":[{"id":"OESA-2023-1692","title":"lcr security update","description":"\r\n\r\nSecurity Fix(es):\r\n\r\nIsula uses the lxc runtime (default) to run malicious images, which can cause DOS.(CVE-2021-33634)","status":"published","published":"2023-09-28T11:06:08Z","modified":"2026-08-18T01:16:54.742197937Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:40.328856Z"}]}}