ghsa-43w2-9j62-hq99
Vulnerability from github
Published
2022-05-24 17:40
Modified
2023-06-13 20:51
Severity ?
VLAI Severity ?
Summary
Buffer overflow in SmallVec::insert_many
Details
A bug in the SmallVec::insert_many method caused it to allocate a buffer that was smaller than needed. It then wrote past the end of the buffer, causing a buffer overflow and memory corruption on the heap. This bug was only triggered if the iterator passed to insert_many yielded more items than the lower bound returned from its size_hint method.
The flaw was corrected in smallvec 0.6.14 and 1.6.1, by ensuring that additional space is always reserved for each item inserted. The fix also simplified the implementation of insert_many to use less unsafe code, so it is easier to verify its correctness.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "smallvec"
},
"ranges": [
{
"events": [
{
"introduced": "0.6.3"
},
{
"fixed": "0.6.14"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "crates.io",
"name": "smallvec"
},
"ranges": [
{
"events": [
{
"introduced": "1.0.0"
},
{
"fixed": "1.6.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-25900"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": true,
"github_reviewed_at": "2022-06-17T00:20:48Z",
"nvd_published_at": "2021-01-26T18:16:00Z",
"severity": "CRITICAL"
},
"details": "A bug in the SmallVec::insert_many method caused it to allocate a buffer that was smaller than needed. It then wrote past the end of the buffer, causing a buffer overflow and memory corruption on the heap. This bug was only triggered if the iterator passed to insert_many yielded more items than the lower bound returned from its size_hint method.\n\nThe flaw was corrected in smallvec 0.6.14 and 1.6.1, by ensuring that additional space is always reserved for each item inserted. The fix also simplified the implementation of insert_many to use less unsafe code, so it is easier to verify its correctness.",
"id": "GHSA-43w2-9j62-hq99",
"modified": "2023-06-13T20:51:42Z",
"published": "2022-05-24T17:40:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-25900"
},
{
"type": "WEB",
"url": "https://github.com/servo/rust-smallvec/issues/252"
},
{
"type": "WEB",
"url": "https://github.com/servo/rust-smallvec/commit/5757ac500d4e544485d796b542e4e589749c291b"
},
{
"type": "WEB",
"url": "https://github.com/servo/rust-smallvec/commit/9998ba0694a6b51aa6604748b00b6a98f0a0039e"
},
{
"type": "PACKAGE",
"url": "https://github.com/servo/rust-smallvec"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2021-0003.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Buffer overflow in SmallVec::insert_many"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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