CVE-2018-1000140
A public proof of concept exists; no exploitation attested.
- Published2018-03-23
- WeaknessCWE-787
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2018-03-2321:29CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-1000140?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-1000140?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.6 | = 6.6 | no fix published | NVD |
| 7.2 | = 7.2 | no fix published | NVD |
| 7.3 | = 7.3 | no fix published | NVD |
| 7.4 | = 7.4 | no fix published | NVD |
| 7.6 | = 7.6 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.7 | = 6.7 | no fix published | NVD |
| 7.3 | = 7.3 | no fix published | NVD |
| 7.4 | = 7.4 | no fix published | NVD |
| 7.5 | = 7.5 | no fix published | NVD |
| 7.6 | = 7.6 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.6 | = 6.6 | no fix published | NVD |
| 7.2 | = 7.2 | no fix published | NVD |
| 7.3 | = 7.3 | no fix published | NVD |
| 7.4 | = 7.4 | no fix published | NVD |
| 7.6 | = 7.6 | no fix published | NVD |
6 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- github.comPatch
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 2 repositories, unverifieds0/rsyslog-librelp-CVE-2018-1000140s0/rsyslog-librelp-CVE-2018-1000140-fixed PoC-in-GitHub
Sources
- NVDCVSS 3.09.8read 2026-10-23
- NVDCVSS 2.07.5read 2026-10-23
- NVDweakness (CWE)CWE-787read 2026-10-23
- FIRST EPSSEPSS score9.3 %2026-10-23
- PoC-in-GitHubproof of concept2read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2018-03-23
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2018-1000140?
Is CVE-2018-1000140 actively exploited?
What is the CVSS score for CVE-2018-1000140?
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