High
libp2p nodes vulnerable to attack using large RSA keys
Type: advisorySources: OSV
go-libp2p is the Go implementation of the libp2p Networking Stack. Prior to versions 0.27.8, 0.28.2, and 0.29.1 malicious peer can use large RSA keys to run a resource exhaustion attack & force a node to spend time doing signature verification of the large key. This vulnerability is present in the core/crypto module of go-libp2p and can occur during the Noise handshake and the libp2p x509 extension verification step. To prevent this attack, go-libp2p versions 0.27.8, 0.28.2, and 0.29.1 restrict RSA keys to <= 8192 bits. To protect one's application, it is necessary to update to these patch releases and to use the updated Go compiler in 1.20.7 or 1.19.12. There are no known workarounds for this issue.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2023-39533
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 12:01 UTC · Revision 1
Source evidence
libp2p nodes vulnerable to attack using large RSA keys
core-osv · Original sourcePublished 8 Aug 2023, 18:50 UTC
go-libp2p is the Go implementation of the libp2p Networking Stack. Prior to versions 0.27.8, 0.28.2, and 0.29.1 malicious peer can use large RSA keys to run a resource exhaustion attack & force a node to spend time doing signature verification of the large key. This vulnerability is present in the core/crypto module of go-libp2p and can occur during the Noise handshake and the libp2p x509 extension verification step. To prevent this attack, go-libp2p versions 0.27.8, 0.28.2, and 0.29.1 restrict RSA keys to <= 8192 bits. To protect one's application, it is necessary to update to these patch releases and to use the updated Go compiler in 1.20.7 or 1.19.12. There are no known workarounds for this issue.
osv:CVE-2023-39533
Complete source record
{
"id": "b719cf2935e1cadd683ee76e6eb565a6b41f74fa7f469fcde313283046276b6c",
"url": "https://osv.dev/vulnerability/CVE-2023-39533",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "libp2p nodes vulnerable to attack using large RSA keys",
"summary": "go-libp2p is the Go implementation of the libp2p Networking Stack. Prior to versions 0.27.8, 0.28.2, and 0.29.1 malicious peer can use large RSA keys to run a resource exhaustion attack & force a node to spend time doing signature verification of the large key. This vulnerability is present in the core/crypto module of go-libp2p and can occur during the Noise handshake and the libp2p x509 extension verification step. To prevent this attack, go-libp2p versions 0.27.8, 0.28.2, and 0.29.1 restrict RSA keys to <= 8192 bits. To protect one's application, it is necessary to update to these patch releases and to use the updated Go compiler in 1.20.7 or 1.19.12. There are no known workarounds for this issue.",
"evidence": "osv:CVE-2023-39533",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2023-39533",
"aliases": [
"CVE-2023-39533",
"GHSA-876p-8259-xjgg",
"GO-2023-2000"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/golang/go",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "2350afd2e8ab054390e284c95d5b089c142db017"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"fixed": "2350afd2e8ab054390e284c95d5b089c142db017"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
},
{
"repo": "https://github.com/libp2p/go-libp2p",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "8506ab233441d434bb777615fffefab64b06f335"
},
{
"introduced": "703c3a4377d1ca2cf3fc93c92c883be1644f3ba6"
},
{
"fixed": "256b838b551a74e682e7fd2c5ac2022d09c78b94"
},
{
"introduced": "636a0966a69a90d54128288465fb48c148741399"
},
{
"fixed": "0cce607219f3710addc7e18672cffd1f1d912fbb"
},
{
"fixed": "445be526aea4ee0b1fa5388aa65d32b2816d3a00"
},
{
"fixed": "e30fcf7dfd4715ed89a5e68d7a4f774d3b9aa92d"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:libp2p:go-libp2p:*:*:*:*:*:go:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "0.27.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:libp2p:go-libp2p:*:*:*:*:*:go:*:*",
"range": [
{
"introduced": "0.28.0"
},
{
"fixed": "0.28.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:libp2p:go-libp2p:0.29.0:*:*:*:*:go:*:*",
"range": [
{
"introduced": "0.29.0"
},
{
"last_affected": "0.29.0"
}
],
"source": "CPE_STRING"
},
{
"range": [
{
"fixed": "0cce607219f3710addc7e18672cffd1f1d912fbb"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "445be526aea4ee0b1fa5388aa65d32b2816d3a00"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "e30fcf7dfd4715ed89a5e68d7a4f774d3b9aa92d"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"0.29.0",
"= 0.29.0",
"go1.19beta1",
"go1.18beta2",
"go1.18beta1",
"go1.17beta1",
"go1.16beta1",
"go1.15beta1",
"go1.14beta1",
"go1.13beta1",
"go1.12beta2",
"go1.12beta1",
"go1.11beta3",
"go1.11beta2",
"go1.11beta1",
"go1.10rc2",
"go1.10rc1",
"go1.10beta2",
"go1.10beta1",
"go1.9beta2",
"go1.9beta1",
"go1.8beta2",
"go1.8beta1",
"go1.7rc4",
"go1.7rc3",
"go1.7rc2",
"go1.7rc1",
"go1.7beta2",
"go1.7beta1",
"go1.6beta2",
"go1.6beta1",
"go1.5beta3",
"go1.5beta2",
"go1.5beta1",
"go1.4beta1",
"go1.3beta2",
"go1.3beta1",
"weekly.2012-03-27",
"weekly",
"weekly.2012-03-22",
"weekly.2012-03-13",
"weekly.2012-03-04",
"weekly.2012-02-22",
"weekly.2012-02-14",
"weekly.2012-02-07",
"weekly.2012-01-27",
"weekly.2012-01-20",
"weekly.2012-01-15",
"weekly.2011-12-22",
"weekly.2011-12-14",
"weekly.2011-12-06",
"weekly.2011-12-02",
"weekly.2011-12-01",
"weekly.2011-11-18",
"weekly.2011-11-09",
"weekly.2011-11-08",
"weekly.2011-11-02",
"weekly.2011-11-01",
"weekly.2011-10-26",
"weekly.2011-10-25",
"weekly.2011-10-18",
"weekly.2011-10-06",
"weekly.2011-09-21",
"weekly.2011-09-16",
"weekly.2011-08-17",
"weekly.2011-09-07",
"weekly.2011-09-01",
"weekly.2011-08-10",
"weekly.2011-07-07",
"weekly.2011-07-29",
"weekly.2011-07-19",
"weekly.2011-06-09",
"weekly.2011-06-23",
"weekly.2011-06-16",
"weekly.2011-06-02",
"weekly.2011-05-22",
"weekly.2011-04-27",
"weekly.2011-04-13",
"weekly.2011-04-04",
"weekly.2011-03-28",
"weekly.2011-03-15",
"weekly.2011-03-07.1",
"release.r56",
"weekly.2011-03-07",
"weekly.2011-02-24",
"weekly.2011-02-15",
"weekly.2011-02-01.1",
"weekly.2011-02-01",
"weekly.2011-01-20",
"weekly.2011-01-19",
"weekly.2011-01-12",
"weekly.2011-01-06",
"weekly.2010-12-22",
"weekly.2010-12-15.1",
"weekly.2010-12-15",
"weekly.2010-12-08",
"weekly.2010-12-02",
"weekly.2010-11-23",
"weekly.2010-11-10",
"weekly.2010-11-02",
"weekly.2010-10-27",
"weekly.2010-10-20",
"weekly.2010-10-13.1",
"weekly.2010-10-13",
"weekly.2010-09-29",
"weekly.2010-09-22",
"weekly.2010-09-15",
"weekly.2010-09-06",
"weekly.2010-08-25",
"weekly.2010-08-11",
"weekly.2010-08-04",
"weekly.2010-07-29",
"weekly.2010-07-14",
"weekly.2010-07-01",
"weekly.2010-06-21",
"weekly.2010-06-09",
"weekly.2010-05-27",
"weekly.2010-05-04",
"weekly.2010-04-27",
"weekly.2010-04-13",
"weekly.2010-03-30",
"weekly.2010-03-22",
"weekly.2010-03-15",
"weekly.2010-03-04",
"weekly.2010-02-23",
"weekly.2010-02-17",
"weekly.2010-02-04",
"weekly.2010-01-27",
"weekly.2010-01-13",
"weekly.2010-01-05",
"weekly.2009-12-22",
"weekly.2009-12-09",
"weekly.2009-12-07",
"weekly.2009-11-17",
"weekly.2009-11-12",
"weekly.2009-11-10.1",
"weekly.2009-11-10",
"weekly.2009-11-06",
"v0.27.7",
"v0.29.0",
"v0.28.1",
"v0.24.2",
"v0.28.0",
"v0.27.6",
"v0.27.5",
"v0.27.4",
"v0.27.3",
"v0.27.2",
"v0.27.1",
"v0.27.0",
"v0.26.1",
"v0.26.0",
"v0.25.1",
"v0.25.0",
"v0.24.1",
"v0.24.0",
"v0.23.2",
"v0.24.0-dev",
"v0.23.1",
"v0.23.0",
"v0.22.0",
"v0.21.0",
"v0.21.0-rc",
"v0.20.0",
"v0.19.0",
"v0.18.0",
"v0.18.0-rc6",
"v0.18.0-rc5",
"v0.18.0-rc4",
"v0.18.0-rc3",
"v0.18.0-rc2",
"v0.18.0-rc1",
"v0.17.0",
"v0.16.0",
"v0.15.0-rc.1",
"v0.16.0-dev",
"v0.14.4",
"v0.14.3",
"v0.14.2",
"v0.14.1",
"v0.14.0",
"v0.13.0",
"v0.12.0",
"v0.11.0",
"v0.10.3",
"v0.10.2",
"v0.10.1",
"v0.10.0",
"v0.9.6",
"v0.9.5",
"v0.9.4",
"v0.9.3",
"v0.9.2",
"v0.9.1",
"v0.9.0",
"v0.8.3",
"v0.8.2",
"v0.8.1",
"v0.8.0",
"v0.7.4",
"v0.7.3",
"v0.7.2",
"v0.7.1",
"v0.7.0",
"v0.6.1",
"v0.6.0",
"v0.5.2",
"v0.5.1",
"v0.0.30",
"v0.5.0",
"v0.4.2",
"v0.4.1",
"v0.4.0",
"v0.3.1",
"v0.3.0",
"v0.2.1",
"v0.2.0",
"v0.1.2",
"v0.1.1",
"v0.1.0",
"v0.0.29",
"v0.0.28",
"v0.0.27",
"v0.0.26",
"v0.0.25",
"v0.0.24",
"v0.0.23",
"v0.0.22",
"v0.0.21",
"v0.0.20",
"v0.0.19",
"v0.0.18",
"v0.0.17",
"v0.0.16",
"v0.0.15",
"v0.0.14",
"v0.0.13",
"v0.0.12",
"v0.0.11",
"v0.0.10",
"v0.0.9",
"v0.0.8",
"v0.0.7",
"v0.0.6",
"v0.0.5",
"v0.0.4",
"v0.0.3",
"v0.0.2",
"gx/v6.0.29",
"gx/v6.0.23",
"gx/v6.0.22",
"gx/v6.0.21",
"gx/v6.0.20",
"gx/v6.0.19",
"gx/v6.0.18",
"gx/v6.0.17",
"gx/v6.0.16",
"gx/v6.0.15",
"gx/v6.0.14",
"gx/v6.0.13",
"gx/v6.0.12",
"gx/v6.0.11",
"gx/v6.0.10",
"gx/v6.0.9",
"gx/v6.0.8",
"gx/v6.0.7",
"gx/v6.0.6",
"gx/v6.0.5",
"gx/v6.0.4",
"gx/v6.0.3",
"gx/v6.0.2",
"gx/v6.0.1",
"gx/v5.0.17",
"gx/v5.0.16",
"gx/v5.0.14",
"gx/v5.0.13",
"gx/v5.0.12",
"gx/v5.0.11",
"gx/v5.0.10",
"gx/v5.0.9",
"gx/v5.0.8",
"gx/v5.0.6",
"gx/v5.0.3",
"gx/v5.0.2",
"gx/v5.0.1",
"gx/v4.5.4",
"gx/v4.5.1",
"gx/v4.5.0",
"gx/v4.4.4",
"gx/v4.4.3",
"gx/v4.4.1",
"gx/v4.4.0",
"gx/v4.3.12",
"gx/v4.3.11",
"gx/v4.3.9",
"gx/v4.3.10",
"gx/v4.3.8",
"gx/v4.3.7",
"gx/v4.3.6",
"gx/v4.3.5",
"gx/v4.3.4",
"gx/v4.3.3",
"gx/v4.3.2",
"gx/v4.3.1",
"gx/v4.2.0",
"gx/v4.1.0",
"gx/v4.0.4",
"gx/v4.0.3",
"gx/v4.0.2",
"gx/v4.0.0",
"gx/v3.6.0",
"gx/v3.5.4",
"gx/v3.5.3",
"gx/v3.5.2",
"gx/v3.5.1",
"gx/v3.5.0",
"gx/v3.4.1",
"gx/v3.4.0",
"gx/v3.3.7",
"gx/v3.3.4",
"gx/v3.3.2",
"gx/v3.3.1",
"gx/v3.2.3",
"gx/v3.2.0",
"gx/v2.0.3",
"gx/v2.0.1",
"gx/v1.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-39533.json"
}
}
],
"modified": "2026-10-28T02:30:35.281864557Z",
"provider": "osv",
"references": [
"https://nrdax.com/techniques/NRDAX-T0205-pre-handshake-crypto-cpu-burn",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39533.json",
"https://github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-xjgg",
"https://nvd.nist.gov/vuln/detail/CVE-2023-39533",
"https://github.com/golang/go/issues/61460",
"https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017",
"https://github.com/libp2p/go-libp2p/commit/0cce607219f3710addc7e18672cffd1f1d912fbb",
"https://github.com/libp2p/go-libp2p/commit/445be526aea4ee0b1fa5388aa65d32b2816d3a00",
"https://github.com/libp2p/go-libp2p/commit/e30fcf7dfd4715ed89a5e68d7a4f774d3b9aa92d",
"https://github.com/libp2p/go-libp2p/pull/2454",
"https://github.com/quic-go/quic-go/pull/4012"
],
"provider_metadata": {
"cwe_ids": [
"CWE-770"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39533.json"
}
},
"related_cves": [
{
"value": "CVE-2023-39533",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 502262,
"published_at": "2023-08-08T18:50:05.418+00:00"
}