{"id":"RUSTSEC-2022-0078","summary":"Use-after-free due to a lifetime error in `Vec::into_iter()`","details":"In affected versions of this crate, the lifetime of the iterator produced by\n`Vec::into_iter()` is not constrained to the lifetime of the `Bump` that\nallocated the vector's memory. Using the iterator after the `Bump` is dropped\ncauses use-after-free accesses.\n\nThe following example demonstrates memory corruption arising from a misuse of\nthis unsoundness.\n\n```rust\nuse bumpalo::{collections::Vec, Bump};\n\nfn main() {\n    let bump = Bump::new();\n    let mut vec = Vec::new_in(&bump);\n    vec.extend([0x01u8; 32]);\n    let into_iter = vec.into_iter();\n    drop(bump);\n\n    for _ in 0..100 {\n        let reuse_bump = Bump::new();\n        let _reuse_alloc = reuse_bump.alloc([0x41u8; 10]);\n    }\n\n    for x in into_iter {\n        print!(\"0x{:02x} \", x);\n    }\n    println!();\n}\n```\n\nThe issue was corrected in version 3.11.1 by adding a lifetime to the `IntoIter`\ntype, and updating the signature of `Vec::into_iter()` to constrain this\nlifetime.","aliases":["GHSA-f85w-wvc7-crwc"],"modified":"2023-11-08T04:18:53.654955Z","published":"2022-01-14T12:00:00Z","database_specific":{"license":"CC0-1.0"},"references":[{"type":"PACKAGE","url":"https://crates.io/crates/bumpalo"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2022-0078.html"},{"type":"WEB","url":"https://github.com/fitzgen/bumpalo/blob/main/CHANGELOG.md#3111"}],"affected":[{"package":{"name":"bumpalo","ecosystem":"crates.io","purl":"pkg:cargo/bumpalo"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.1.0"},{"fixed":"3.11.1"}]}],"ecosystem_specific":{"affected_functions":null,"affects":{"arch":[],"functions":["bumpalo::collections::vec::Vec::into_iter"],"os":[]}},"database_specific":{"categories":["memory-corruption","memory-exposure"],"cvss":null,"informational":"unsound","source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2022-0078.json"}}],"schema_version":"1.7.3"}