rustsec-2021-0027
Vulnerability from osv_rustsec
Published
2021-01-07 12:00
Modified
2023-06-13 13:10
Summary
Loading a bgzip block can write out of bounds if size overflows.
Details
Affected versions of bam set the length of an internal buffer using
self.compressed.set_len(block_size - HEADER_SIZE - MIN_EXTRA_SIZE) and then
wrote into it. While block_size was constrained to a proper maximum, when it
was too small the subtraction could overflow negatively to a large number past
the capacity of self.compressed.
This can result in memory corruption in the form of writing out of bounds when
loading a bgzip file with a small block_size.
Commit 061eee38d4 fixed this issue by checking for the underflow when setting
the buffer size.
{
"affected": [
{
"database_specific": {
"categories": [
"memory-corruption"
],
"cvss": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"informational": null
},
"ecosystem_specific": {
"affected_functions": null,
"affects": {
"arch": [],
"functions": [
"bam::bgzip::Block::load"
],
"os": []
}
},
"package": {
"ecosystem": "crates.io",
"name": "bam",
"purl": "pkg:cargo/bam"
},
"ranges": [
{
"events": [
{
"introduced": "0.0.0-0"
},
{
"fixed": "0.1.3"
}
],
"type": "SEMVER"
}
],
"versions": []
}
],
"aliases": [
"CVE-2021-28027",
"GHSA-cpqj-r29q-chrh"
],
"database_specific": {
"license": "CC0-1.0"
},
"details": "Affected versions of `bam` set the length of an internal buffer using\n`self.compressed.set_len(block_size - HEADER_SIZE - MIN_EXTRA_SIZE)` and then\nwrote into it. While `block_size` was constrained to a proper maximum, when it\nwas too small the subtraction could overflow negatively to a large number past\nthe capacity of `self.compressed`.\n\nThis can result in memory corruption in the form of writing out of bounds when\nloading a `bgzip` file with a small `block_size`.\n\nCommit `061eee38d4` fixed this issue by checking for the underflow when setting\nthe buffer size.",
"id": "RUSTSEC-2021-0027",
"modified": "2023-06-13T13:10:24Z",
"published": "2021-01-07T12:00:00Z",
"references": [
{
"type": "PACKAGE",
"url": "https://crates.io/crates/bam"
},
{
"type": "ADVISORY",
"url": "https://rustsec.org/advisories/RUSTSEC-2021-0027.html"
},
{
"type": "REPORT",
"url": "https://gitlab.com/tprodanov/bam/-/issues/4"
}
],
"related": [],
"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": "Loading a bgzip block can write out of bounds if size overflows."
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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