CVE-2018-1000140

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 9%CVSS: 9.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation10% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
9%
EPSS %ILE
95%
KEV
Not listed

Published

March 23, 2018

Last Modified

November 21, 2024

Advisory Details (9)

Auto-updated Sep 5, 2026
Patch available. Sources: redhat.
generic

librelp/src/tcp.c at 532aa362f0f7a8d037505b0a27a1df452f9bac9e · rsyslog/librelp · GitHub

https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tcp.c#L1205
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.3 Extended Update Support.

https://access.redhat.com/errata/RHSA-2018:1707
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.4 Extended Update Support.

https://access.redhat.com/errata/RHSA-2018:1704
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.2 Advanced Update Support, Red Hat Enterprise Linux 7.2 Telco Extended Update Support, and Red Hat

https://access.redhat.com/errata/RHSA-2018:1703
redhat Patch Available

Affected: Red Hat Enterprise Linux 6.7 Extended Update Support.

https://access.redhat.com/errata/RHSA-2018:1702
redhat Patch Available

Affected: Red Hat Enterprise Linux 6.6 Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco Extended Update Support.

https://access.redhat.com/errata/RHSA-2018:1701
redhat Patch Available

Affected: Red Hat Enterprise Linux 6.

https://access.redhat.com/errata/RHSA-2018:1225
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2018:1223
generic

Packet Storm Security

http://packetstormsecurity.com/files/172829/librelp-Remote-Code-Execution.html

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibrelp0 (1.2.2-2ubuntu1.1) @ trusty2026-05-28ubuntu
ubuntulibrelp-dev (1.2.9-1ubuntu0.1~esm1) @ xenial2026-05-28ubuntu
redhatlibrelp-0:1.2.7-3.el6_6.12018-05-23redhat
redhatlibrelp-0:1.2.7-3.el6_7.12018-05-23redhat
redhatlibrelp-0:1.2.0-4.el7_32018-05-23redhat
redhatlibrelp-0:1.2.12-1.el7_4.12018-05-23redhat
redhatlibrelp-0:1.2.0-4.el7_22018-05-23redhat
redhatlibrelp-0:1.2.12-1.el7_5.12018-04-24redhat
redhatlibrelp-0:1.2.7-3.el6_9.12018-04-24redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
librelp—1.2.15-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
librelp—1.2.15-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
librelp—1.2.15-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
librelp—1.2.15-1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
librelp1.2.7-21.2.7-2+deb8u1—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
librelp1.2.12-11.2.12-1+deb9u1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(9)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 126 total refreshes for this CVE.

  1. 2026-09-05 15:24 UTCEPSS rescore
  2. 2026-09-04 13:56 UTCEPSS rescore
  3. 2026-09-04 05:02 UTCEPSS rescore
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  13. 2026-08-22 21:07 UTCOSV refresh
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  24. 2026-08-07 00:34 UTCOSV refresh
  25. 2026-08-06 13:42 UTCEPSS rescore
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  1. 2026-08-06 13:42 UTCEPSS rescore
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  8. 2026-07-28 15:32 UTCEPSS rescore
  9. 2026-07-23 14:15 UTCEPSS rescore
  10. 2026-07-23 01:32 UTCEG score recompute
  11. 2026-07-22 22:12 UTCEG score recompute
  12. 2026-07-22 14:04 UTCEPSS rescore
  13. 2026-07-21 16:18 UTCOSV refresh
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  22. 2026-07-16 16:59 UTCEPSS rescore
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  24. 2026-07-15 16:55 UTCEPSS rescore
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  26. 2026-07-15 01:56 UTCEPSS rescore
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  28. 2026-07-13 22:26 UTCEPSS rescore
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  30. 2026-07-12 05:43 UTCEPSS rescore
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  40. 2026-07-04 11:56 UTCOSV refresh
  41. 2026-07-04 06:28 UTCEPSS rescore
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  43. 2026-07-02 16:54 UTCEPSS rescore
  44. 2026-07-01 15:03 UTCEPSS rescore
  45. 2026-06-30 23:19 UTCEPSS rescore
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  49. 2026-06-28 04:53 UTCEPSS rescore
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  51. 2026-06-27 03:06 UTCEPSS rescore
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  68. 2026-06-15 23:14 UTCOSV refresh
  69. 2026-06-15 17:45 UTCEPSS rescore
  70. 2026-06-14 23:14 UTCEPSS rescore
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  72. 2026-06-13 22:58 UTCEPSS rescore
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  74. 2026-06-12 23:09 UTCEPSS rescore
  75. 2026-06-12 23:09 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2018-1000140?
CVE-2018-1000140 is a critical vulnerability published on March 23, 2018. 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…
When was CVE-2018-1000140 disclosed?
CVE-2018-1000140 was first published in the National Vulnerability Database on March 23, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-1000140 actively exploited?
CVE-2018-1000140 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9% probability of exploitation in the next 30 days, which ranks it in the top 5.0% of all scored CVEs.
What is the CVSS score of CVE-2018-1000140?
CVE-2018-1000140 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2018-1000140?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-1000140, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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