{"id":"CVE-2024-36400","aliases":["GHSA-2hfw-w739-p7x5","GHSA-9hc7-6w9r-wj94","RUSTSEC-2024-0343"],"url":"https://o3.security/vulnerability/CVE-2024-36400","summary":"nano-id is unable to generate the correct character set","details":"## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-9hc7-6w9r-wj94. This link is maintained to preserve external references.\n\n## Original Description\n## Description\n\nAffected versions of the nano-id crate incorrectly generated IDs using a reduced character set in the `nano_id::base62` and `nano_id::base58` functions. Specifically, the `base62` function used a character set of 32 symbols instead of the intended 62 symbols, and the `base58` function used a character set of 16 symbols instead of the intended 58 symbols. Additionally, the `nano_id::gen` macro is also affected when a custom character set that is not a power of 2 in size is specified.\n\nIt should be noted that `nano_id::base64` is not affected by this vulnerability.\n\n## Impact\n\nThis can result in a significant reduction in entropy, making the generated IDs predictable and vulnerable to brute-force attacks when the IDs are used in security-sensitive contexts such as session tokens or unique identifiers.\n\n## Patches\n\nThe flaws were corrected in commit [a9022772b2f1ce38929b5b81eccc670ac9d3ab23](https://github.com/viz-rs/nano-id/commit/a9022772b2f1ce38929b5b81eccc670ac9d3ab23) by updating the the `nano_id::gen` macro to use all specified characters correctly.\n\n## PoC\n\n```rust\nuse std::collections::BTreeSet;\n\nfn main() {\n    test_base58();\n    test_base62();\n}\n\nfn test_base58() {\n    let mut produced_symbols = BTreeSet::new();\n\n    for _ in 0..100_000 {\nid = \"RUSTSEC-2024-0343\"\n        for c in id.chars() {\n            produced_symbols.insert(c);\n        }\n    }\n\n    println!(\n        \"{} symbols generated from nano_id::base58\",\n        produced_symbols.len()\n    );\n}\n\nfn test_base62() {\n    let mut produced_symbols = BTreeSet::new();\n\n    for _ in 0..100_000 {\nid = \"RUSTSEC-2024-0343\"\n        for c in id.chars() {\n            produced_symbols.insert(c);\n        }\n    }\n\n    println!(\n        \"{} symbols generated from nano_id::base62\",\n        produced_symbols.len()\n    );\n}\n```","published":"2024-06-04T14:11:26.945Z","modified":"2026-08-12T03:51:08.480652211Z","cvss":{"score":9.4,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"crates.io","name":"nano-id","fixedVersion":"0.4.0"}],"fix":{"url":"https://github.com/viz-rs/nano-id/commit/a9022772b2f1ce38929b5b81eccc670ac9d3ab23","label":"viz-rs/nano-id@a902277"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36400.json"},{"type":"ADVISORY","url":"https://github.com/viz-rs/nano-id/security/advisories/GHSA-9hc7-6w9r-wj94"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-36400"},{"type":"FIX","url":"https://github.com/viz-rs/nano-id/commit/a9022772b2f1ce38929b5b81eccc670ac9d3ab23"},{"type":"PACKAGE","url":"https://github.com/viz-rs/nano-id"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2024-0343.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:08.480652211Z"}}