{"id":"GHSA-mmc9-pwm7-qj5w","summary":"Unaligned memory access in rand_core","details":"### Impact\nAffected versions of this crate violated alignment when casting byte slices to integer slices, resulting in undefined behavior. `rand_core::BlockRng::next_u64` and `rand_core::BlockRng::fill_bytes` are affected.\n\n### Patches\nThe flaw was corrected by Ralf Jung and Diggory Hardy for `rand_core \u003e= 0.4.2`.\n\n### Workarounds\nNone.\n\n### References\nSee [Rand's changelog](https://github.com/rust-random/rand/blob/master/rand_core/CHANGELOG.md#050---2019-06-06).\n\n### For more information\nIf you have any questions or comments about this advisory, [open an issue in the Rand repository](https://github.com/rust-random/rand/issues/new/choose).\n\n","aliases":["CVE-2020-25576","RUSTSEC-2019-0035"],"modified":"2023-11-08T04:03:10.161773Z","published":"2021-08-25T20:56:50Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2021-08-18T20:45:24Z","nvd_published_at":null,"cwe_ids":["CWE-704"],"severity":"CRITICAL"},"references":[{"type":"WEB","url":"https://github.com/rust-random/rand/security/advisories/GHSA-mmc9-pwm7-qj5w"},{"type":"PACKAGE","url":"https://github.com/rust-random/rand"},{"type":"WEB","url":"https://github.com/rust-random/rand/blob/master/rand_core/CHANGELOG.md#050---2019-06-06"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2019-0035.html"}],"affected":[{"package":{"name":"rand_core","ecosystem":"crates.io","purl":"pkg:cargo/rand_core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.4.0"},{"fixed":"0.4.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/08/GHSA-mmc9-pwm7-qj5w/GHSA-mmc9-pwm7-qj5w.json"}},{"package":{"name":"rand_core","ecosystem":"crates.io","purl":"pkg:cargo/rand_core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.3.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/08/GHSA-mmc9-pwm7-qj5w/GHSA-mmc9-pwm7-qj5w.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}