Medium
Security advisory
A buffer over-read vulnerability exists in bl <4.0.3, <3.0.1, <2.2.1, and <1.2.3 which could allow an attacker to supply user input (even typed) that if it ends up in consume() argument and can become negative, the BufferList state can be corrupted, tricking it into exposing uninitialized memory via regular .slice() calls.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-8244
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:18 UTC · Revision 1
Source evidence
A buffer over-read vulnerability exists in bl <4.0.3, <3.0.1, <2.2.1, and <1.2.3 which could allow an attacker to supply user input (even typed) that if it ends up in consume() argument and can become negative, the BufferList state can be corrupted, tricking it into exposing uninitialized memory via regular .slice() calls.
osv:CVE-2020-8244
Complete source record
{
"id": "cb1b782390cc5b30cc42bd8be1625eb9885ddb8b0a891fbb471a6c417d5467e1",
"url": "https://osv.dev/vulnerability/CVE-2020-8244",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-8244",
"summary": "A buffer over-read vulnerability exists in bl <4.0.3, <3.0.1, <2.2.1, and <1.2.3 which could allow an attacker to supply user input (even typed) that if it ends up in consume() argument and can become negative, the BufferList state can be corrupted, tricking it into exposing uninitialized memory via regular .slice() calls.",
"evidence": "osv:CVE-2020-8244",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-8244",
"aliases": [
"CVE-2020-8244",
"GHSA-pp7h-53gx-mx7r"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/rvagg/bl",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "d69edfd66f2b1d8b50abc0ecfe42216437540178"
},
{
"introduced": "52564cc1b2091374f66ca4544f686f199fd4537d"
},
{
"fixed": "8cb93f455f0b44fe0ffaee75a3c74c84579dc8c1"
},
{
"introduced": "ecc0cc51ef62f41ae151e82d61a8eac71c2ca672"
},
{
"fixed": "84e1852465572927d9151e6484f351d712b94dea"
},
{
"introduced": "8ca2ec434a053d48b399c5b5cb06ad00202cc5d4"
},
{
"fixed": "f659836cc84211cad41b73bad89c78f7f874c626"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:bufferlist_project:bufferlist:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.2.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:bufferlist_project:bufferlist:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.2.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:bufferlist_project:bufferlist:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.0.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:bufferlist_project:bufferlist:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v1.2.2",
"v2.2.0",
"v3.0.0",
"v4.0.2",
"v4.0.1",
"v4.0.0",
"v2.1.2",
"v2.1.1",
"v2.1.0",
"v2.0.1",
"v2.0.0",
"v1.2.1",
"v1.2.0",
"v1.1.2",
"v1.1.1",
"v1.1.0",
"v1.0.3",
"v1.0.2",
"v1.0.1",
"v0.9.4",
"v1.0.0",
"v0.9.3",
"v0.9.2",
"v0.9.1",
"v0.9.0",
"v0.8.2",
"v0.8.1",
"v0.8.0",
"v0.7.0",
"v0.6.0",
"0.5.0",
"0.4.2",
"0.2.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8244.json"
}
}
],
"modified": "2026-10-24T10:30:17.014472500Z",
"provider": "osv",
"references": [
"https://lists.debian.org/debian-lts-announce/2021/06/msg00028.html",
"https://hackerone.com/reports/966347"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-8244",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 429473,
"published_at": "2020-08-30T15:15:12.167+00:00"
}