CVE-2018-1000140
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (9.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 9.34% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- rsyslog/librelp · debian/debian linux · canonical/ubuntu linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server tus · redhat/enterprise linux workstation
- Source
- cve@mitre.org
EPSS 9.3% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/172829/librelp-Remote-Code-Execution.html
- https://access.redhat.com/errata/RHSA-2018:1223Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1225Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1701Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1702Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1703Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1704Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1707Third Party Advisory
- https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tcp.c#L1205Patch, Third Party Advisory
- https://lgtm.com/rules/1505913226124/Exploit, Third Party Advisory
- https://security.gentoo.org/glsa/201804-21Third Party Advisory
- https://usn.ubuntu.com/3612-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4151Third Party Advisory
- http://packetstormsecurity.com/files/172829/librelp-Remote-Code-Execution.html
- https://access.redhat.com/errata/RHSA-2018:1223Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1225Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1701Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1702Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1703Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1704Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1707Third Party Advisory
- https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tcp.c#L1205Patch, Third Party Advisory
- https://lgtm.com/rules/1505913226124/Exploit, Third Party Advisory
- https://security.gentoo.org/glsa/201804-21Third Party Advisory
- https://usn.ubuntu.com/3612-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4151Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.