Critical
Security advisory
Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files. Configurations that use the `refuse-app` option are unaffected.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-11574
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:10 UTC · Revision 1
Source evidence
Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files. Configurations that use the `refuse-app` option are unaffected.
osv:CVE-2018-11574
Complete source record
{
"id": "f7984d1ddf45d665ac06ca5479c304156ee61ce187e674f31f61b58bec9bf0d1",
"url": "https://osv.dev/vulnerability/CVE-2018-11574",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-11574",
"summary": "Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files. Configurations that use the `refuse-app` option are unaffected.",
"evidence": "osv:CVE-2018-11574",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2018-11574",
"aliases": [
"CVE-2018-11574"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/ppp-project/ppp",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "4fb319056f168bb8379865b91b4fd3e1ada73f1e"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:point-to-point_protocol_project:point-to-point_protocol:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.4.9"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v2.4.8",
"ppp-2.4.8",
"v2.4.7",
"ppp-2.4.7",
"v2.4.6",
"ppp-2.4.6",
"v2.4.5",
"ppp-2.4.5",
"v2.4.4",
"ppp-2.4.4",
"v2.4.3",
"ppp-2.4.3",
"v2.4.2",
"ppp-2.4.2",
"v2.4.1",
"ppp-2.4.1",
"v2.4.0",
"ppp-2.4.0",
"v2.3.11",
"ppp-2.3.11",
"v2.3.10",
"ppp-2.3.10",
"v2.3.9",
"ppp-2.3.9",
"v2.3.8",
"ppp-2.3.8",
"v2.3.7",
"ppp-2.3.7",
"v2.3.6",
"ppp-2.3.6",
"v2.3.5",
"ppp-2.3.5",
"v2.3.4",
"ppp-2.3.4",
"v2.3.3",
"ppp-2.3.3",
"v2.3.2",
"ppp-2.3.2",
"v2.3.1",
"ppp-2.3.1",
"v2.3.0",
"ppp-2.3.0",
"v2.2",
"ppp-2.2",
"v2.1.2",
"ppp-2.1.2",
"v2.1.1",
"ppp-2.1.1",
"v2.0.4",
"ppp-2.0.4"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-11574.json"
}
}
],
"modified": "2026-10-24T10:30:25.372002151Z",
"provider": "osv",
"references": [
"https://usn.ubuntu.com/3810-1/"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:esm:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
},
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-11574",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 431344,
"published_at": "2018-06-14T20:29:00.253+00:00"
}