Critical
Security advisory
rsyslog librelp version 1.2.14 and earlier contains a Buffer Overflow vulnerability in the checking of x509 certificates from a peer that can result in Remote code execution. This attack appear to be exploitable a remote attacker that can connect to rsyslog and trigger a stack buffer overflow by sending a specially crafted x509 certificate.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-1000140
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 09:59 UTC · Revision 1
Source evidence
rsyslog librelp version 1.2.14 and earlier contains a Buffer Overflow vulnerability in the checking of x509 certificates from a peer that can result in Remote code execution. This attack appear to be exploitable a remote attacker that can connect to rsyslog and trigger a stack buffer overflow by sending a specially crafted x509 certificate.
osv:CVE-2018-1000140
Complete source record
{
"id": "ef134c12e0fc507c7a0bc61000f8a57beccda19cd1d0d308400f670a7bd478b2",
"url": "https://osv.dev/vulnerability/CVE-2018-1000140",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-1000140",
"summary": "rsyslog librelp version 1.2.14 and earlier contains a Buffer Overflow vulnerability in the checking of x509 certificates from a peer that can result in Remote code execution. This attack appear to be exploitable a remote attacker that can connect to rsyslog and trigger a stack buffer overflow by sending a specially crafted x509 certificate.",
"evidence": "osv:CVE-2018-1000140",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2018-1000140",
"aliases": [
"CVE-2018-1000140"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/rsyslog/librelp",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "fc512e337bfc7c92770246dbff5f482b879498b9"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:rsyslog:librelp:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "1.2.14"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v1.2.14",
"v1.2.13",
"v1.2.12",
"v1.2.11",
"v1.2.10",
"v1.2.9",
"v1.2.8",
"v1.2.7",
"v1.2.5",
"v1.2.4",
"v1.2.3",
"v1.2.2",
"v1.2.1",
"v1.2.0",
"v1.1.5",
"v1.1.4",
"v1.1.3",
"v1.1.2",
"good-1.1.2",
"v1.1.1",
"v1.1.0",
"v1.0.6",
"v1.0.5",
"v1.0.3",
"v1.0.2",
"v1.0.1",
"v1.0.0",
"v0.1.3",
"v0.1.1",
"v0.1.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-1000140.json"
}
}
],
"modified": "2026-10-20T10:49:38.922560720Z",
"provider": "osv",
"references": [
"https://access.redhat.com/errata/RHSA-2018:1223",
"https://access.redhat.com/errata/RHSA-2018:1225",
"https://access.redhat.com/errata/RHSA-2018:1701",
"https://access.redhat.com/errata/RHSA-2018:1702",
"https://access.redhat.com/errata/RHSA-2018:1703",
"https://access.redhat.com/errata/RHSA-2018:1704",
"https://access.redhat.com/errata/RHSA-2018:1707",
"https://security.gentoo.org/glsa/201804-21",
"https://usn.ubuntu.com/3612-1/",
"https://www.debian.org/security/2018/dsa-4151",
"https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tcp.c#L1205",
"https://lgtm.com/rules/1505913226124/"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
},
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_desktop",
"extracted_events": [
{
"range": [
{
"introduced": "6.0"
},
{
"last_affected": "6.0"
},
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server",
"extracted_events": [
{
"range": [
{
"introduced": "6.0"
},
{
"last_affected": "6.0"
},
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server_aus",
"extracted_events": [
{
"range": [
{
"introduced": "6.6"
},
{
"last_affected": "6.6"
},
{
"introduced": "7.2"
},
{
"last_affected": "7.2"
},
{
"introduced": "7.3"
},
{
"last_affected": "7.3"
},
{
"introduced": "7.4"
},
{
"last_affected": "7.4"
},
{
"introduced": "7.6"
},
{
"last_affected": "7.6"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server_eus:6.7:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server_eus",
"extracted_events": [
{
"range": [
{
"introduced": "6.7"
},
{
"last_affected": "6.7"
},
{
"introduced": "7.3"
},
{
"last_affected": "7.3"
},
{
"introduced": "7.4"
},
{
"last_affected": "7.4"
},
{
"introduced": "7.5"
},
{
"last_affected": "7.5"
},
{
"introduced": "7.6"
},
{
"last_affected": "7.6"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server_tus:6.6:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server_tus",
"extracted_events": [
{
"range": [
{
"introduced": "6.6"
},
{
"last_affected": "6.6"
},
{
"introduced": "7.2"
},
{
"last_affected": "7.2"
},
{
"introduced": "7.3"
},
{
"last_affected": "7.3"
},
{
"introduced": "7.4"
},
{
"last_affected": "7.4"
},
{
"introduced": "7.6"
},
{
"last_affected": "7.6"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_workstation",
"extracted_events": [
{
"range": [
{
"introduced": "6.0"
},
{
"last_affected": "6.0"
},
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-1000140",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 380638,
"published_at": "2018-03-23T21:29:00.647+00:00"
}