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Fencer Vulns
critical 9.8

CVE-2018-1000140 json

rsyslog librelp version 1.2.14 and earlier contains a Buffer Overflow vulnerability in the checking of x509 certificates from a peer that c…

published 2018-03-23 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-1858

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.3%
EPSS 9.3% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

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.

Patch / fix

  • librelp Debian 14, Debian 13, Debian 12 1.2.15-1

debian advisories DEBIAN-CVE-2018-1000140

  • librelp Ubuntu 14.04 LTS 1.2.2-2ubuntu1.1
  • librelp Ubuntu Pro 16.04 LTS 1.2.9-1ubuntu0.1~esm1
  • librelp Ubuntu Pro 18.04 LTS 1.2.14-3ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2018-1000140

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • librelp RHEL 6 1.2.7-3.el6_9.1
  • librelp RHEL 7 1.2.12-1.el7_5.1
  • librelp RHEL 6.6 TUS, RHEL 6.6 AUS 1.2.7-3.el6_6.1
  • librelp RHEL 6.7 EUS 1.2.7-3.el6_7.1
  • librelp RHEL 7.2 TUS, RHEL 7.2 E4S, RHEL 7.2 AUS 1.2.0-4.el7_2
  • librelp RHEL 7.3 EUS 1.2.0-4.el7_3
  • librelp RHEL 7.4 EUS 1.2.12-1.el7_4.1

red hat advisories RHSA-2018:1701RHSA-2018:1702RHSA-2018:1703RHSA-2018:1707RHSA-2018:1704RHSA-2018:1225

  • librelp SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +10 more 1.2.15-3.6.3
  • librelp SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for Raspberry Pi 12 SP2 +5 more 1.2.7-3.3.1
  • librelp SLES for SAP 12 SP3, SLES 12 SP3, SLE Software Development Kit 12 SP3 1.2.12-3.3.1

suse advisories SUSE-SU-2022:1891-1SUSE-SU-2018:0828-1SUSE-SU-2018:0822-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-1000140 updated cvss 8.1

librelp: Stack-based buffer overflow in relpTcpChkPeerName function in src/tcp.c

  • Red Hat Enterprise Linux Client (v. 7) librelp 1.2.12-1.el7_5.1 Red Hat Enterprise Linux Client Optional (v. 7) librelp-devel 1.2.12-1.el7_5.1, librelp-debuginfo 1.2.12-1.el7_5.1 Red Hat Enterprise Linux ComputeNode (v. 7) librelp 1.2.12-1.el7_5.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1223
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.3) librelp 1.2.0-4.el7_3
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1707
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) librelp 1.2.12-1.el7_4.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1704
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) librelp-devel 1.2.12-1.el7_5.1, librelp-debuginfo 1.2.12-1.el7_5.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1223
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) librelp-devel 1.2.0-4.el7_3, librelp-debuginfo 1.2.0-4.el7_3
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1707
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) librelp-devel 1.2.12-1.el7_4.1, librelp-debuginfo 1.2.12-1.el7_4.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1704
  • Red Hat Enterprise Linux Desktop (v. 6) librelp 1.2.7-3.el6_9.1 Red Hat Enterprise Linux Desktop Optional (v. 6) librelp 1.2.7-3.el6_9.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1225
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) librelp 1.2.12-1.el7_5.1 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) librelp-devel 1.2.12-1.el7_5.1, librelp-debuginfo 1.2.12-1.el7_5.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1223
show 26 more
  • Red Hat Enterprise Linux HPC Node (v. 6) librelp 1.2.7-3.el6_9.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1225
  • Red Hat Enterprise Linux HPC Node EUS (v. 6.7) librelp 1.2.7-3.el6_7.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1702
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) librelp 1.2.7-3.el6_9.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1225
  • Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) librelp 1.2.7-3.el6_7.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1702
  • Red Hat Enterprise Linux Server (v. 6) librelp 1.2.7-3.el6_9.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1225
  • Red Hat Enterprise Linux Server (v. 7) librelp 1.2.12-1.el7_5.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1223
  • Red Hat Enterprise Linux Server AUS (v. 6.6) librelp 1.2.7-3.el6_6.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1701
  • Red Hat Enterprise Linux Server AUS (v. 7.2) librelp 1.2.0-4.el7_2 Red Hat Enterprise Linux Server E4S (v. 7.2) librelp 1.2.0-4.el7_2
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1703
  • Red Hat Enterprise Linux Server EUS (v. 6.7) librelp 1.2.7-3.el6_7.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1702
  • Red Hat Enterprise Linux Server EUS (v. 7.3) librelp 1.2.0-4.el7_3
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1707
  • Red Hat Enterprise Linux Server EUS (v. 7.4) librelp 1.2.12-1.el7_4.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1704
  • Red Hat Enterprise Linux Server Optional (v. 6) librelp 1.2.7-3.el6_9.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1225
  • Red Hat Enterprise Linux Server Optional (v. 7) librelp-devel 1.2.12-1.el7_5.1, librelp-debuginfo 1.2.12-1.el7_5.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1223
  • Red Hat Enterprise Linux Server Optional AUS (v. 6.6) librelp 1.2.7-3.el6_6.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1701
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) librelp-devel 1.2.0-4.el7_2, librelp-debuginfo 1.2.0-4.el7_2 Red Hat Enterprise Linux Server Optional E4S (v. 7.2) librelp-devel 1.2.0-4.el7_2, librelp-debuginfo 1.2.0-4.el7_2
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1703
  • Red Hat Enterprise Linux Server Optional EUS (v. 6.7) librelp 1.2.7-3.el6_7.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1702
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.3) librelp-devel 1.2.0-4.el7_3, librelp-debuginfo 1.2.0-4.el7_3
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1707
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.4) librelp-devel 1.2.12-1.el7_4.1, librelp-debuginfo 1.2.12-1.el7_4.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1704
  • Red Hat Enterprise Linux Server Optional TUS (v. 6.6) librelp 1.2.7-3.el6_6.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1701
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.2) librelp-devel 1.2.0-4.el7_2, librelp-debuginfo 1.2.0-4.el7_2
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1703
  • Red Hat Enterprise Linux Server TUS (v. 6.6) librelp 1.2.7-3.el6_6.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1701
  • Red Hat Enterprise Linux Server TUS (v. 7.2) librelp 1.2.0-4.el7_2
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1703
  • Red Hat Enterprise Linux Workstation (v. 6) librelp 1.2.7-3.el6_9.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1225
  • Red Hat Enterprise Linux Workstation (v. 7) librelp 1.2.12-1.el7_5.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1223
  • Red Hat Enterprise Linux Workstation Optional (v. 6) librelp 1.2.7-3.el6_9.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1225
  • Red Hat Enterprise Linux Workstation Optional (v. 7) librelp-devel 1.2.12-1.el7_5.1, librelp-debuginfo 1.2.12-1.el7_5.1
    fixed: vendor fix “Users are strongly advised not to expose their logging RELP services to a public network.” RHSA-2018:1223

1 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

9.34% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • lgtm.com https://lgtm.com/rules/1505913226124/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.