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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | librelp | 1.2.15-1 | — |
| Debian 13 | librelp | 1.2.15-1 | — |
| Debian 12 | librelp | 1.2.15-1 | — |
| Debian 9 | librelp | 1.2.12-1+deb9u1 | DSA-4151-1 |
| Debian 8 | librelp | 1.2.7-2+deb8u1 | DSA-4151-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | librelp | 1.2.2-2ubuntu1.1 | USN-3612-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | librelp | 1.2.14-3ubuntu0.1~esm1 | USN-4828-1 |
| Ubuntu Pro 16.04 LTS | librelp | 1.2.9-1ubuntu0.1~esm1 | USN-4828-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | librelp +1 | 1.2.12-1.el7_5.1 | RHSA-2018:1223 |
| RHEL 6 | librelp +1 | 1.2.7-3.el6_9.1 | RHSA-2018:1225 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.4 EUS | librelp +1 | 1.2.12-1.el7_4.1 | RHSA-2018:1704 |
| RHEL 7.3 EUS | librelp +1 | 1.2.0-4.el7_3 | RHSA-2018:1707 |
| RHEL 7.2 TUS | librelp +1 | 1.2.0-4.el7_2 | RHSA-2018:1703 |
| RHEL 7.2 E4S | librelp +1 | 1.2.0-4.el7_2 | RHSA-2018:1703 |
| RHEL 7.2 AUS | librelp +1 | 1.2.0-4.el7_2 | RHSA-2018:1703 |
| RHEL 6.7 EUS | librelp +1 | 1.2.7-3.el6_7.1 | RHSA-2018:1702 |
| RHEL 6.6 TUS | librelp +1 | 1.2.7-3.el6_6.1 | RHSA-2018:1701 |
| RHEL 6.6 AUS | librelp +1 | 1.2.7-3.el6_6.1 | RHSA-2018:1701 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | librelp | 1.2.15-3.6.3 | SUSE-SU-2022:1891-1 |
| SLES 12 SP4 | librelp | 1.2.15-3.6.3 | SUSE-SU-2022:1891-1 |
| SLES 12 SP3 | librelp | 1.2.12-3.3.1 | SUSE-SU-2022:1891-1, SUSE-SU-2018:0822-1 |
| SLES 12 SP2 | librelp | 1.2.7-3.3.1 | SUSE-SU-2018:0828-1 |
| SLES 12 SP1 | librelp | 1.2.7-3.3.1 | SUSE-SU-2018:0828-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | librelp | 1.2.7-3.3.1 | SUSE-SU-2018:0828-1 |
| SLES for SAP 12 SP5 | librelp | 1.2.15-3.6.3 | SUSE-SU-2022:1891-1 |
| SLES for SAP 12 SP4 | librelp | 1.2.15-3.6.3 | SUSE-SU-2022:1891-1 |
| SLES for SAP 12 SP3 | librelp | 1.2.12-3.3.1 | SUSE-SU-2022:1891-1, SUSE-SU-2018:0822-1 |
| SLES for SAP 12 SP2 | librelp | 1.2.7-3.3.1 | SUSE-SU-2018:0828-1 |
| SLES for SAP 12 SP1 | librelp | 1.2.7-3.3.1 | SUSE-SU-2018:0828-1 |
| SUSE OpenStack Cloud Crowbar 9 | librelp | 1.2.15-3.6.3 | SUSE-SU-2022:1891-1 |
| SUSE OpenStack Cloud Crowbar 8 | librelp | 1.2.15-3.6.3 | SUSE-SU-2022:1891-1 |
| SUSE OpenStack Cloud 9 | librelp | 1.2.15-3.6.3 | SUSE-SU-2022:1891-1 |
| SUSE OpenStack Cloud 8 | librelp | 1.2.15-3.6.3 | SUSE-SU-2022:1891-1 |
| SUSE OpenStack Cloud 6 | librelp | 1.2.7-3.3.1 | SUSE-SU-2018:0828-1 |
| SUSE HPE Helion OpenStack 8 | librelp | 1.2.15-3.6.3 | SUSE-SU-2022:1891-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | librelp +1 | 1.2.12-1.amzn2.0.1 | ALAS2-2018-998 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | librelp +1 | 1.2.12-1.el7_5.1 | ELSA-2018-1223 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
s0/rsyslog-librelp-CVE-2018-1000140 ★ 0 · May 14, 2019
Pinned version of rsyslov vulnerable to CVE-2018-1000140
-
s0/rsyslog-librelp-CVE-2018-1000140-fixed ★ 0 · May 14, 2019
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 15
- RHSA-2018:1703 Red Hat Security Advisory: librelp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2018:1701 Red Hat Security Advisory: librelp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2018:1707 Red Hat Security Advisory: librelp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2018:1704 Red Hat Security Advisory: librelp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2018:1702 Red Hat Security Advisory: librelp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2018:1225 Red Hat Security Advisory: librelp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2018:1223 Red Hat Security Advisory: librelp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4828-1 librelp vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-3612-1 librelp vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4151-1 librelp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:0828-1 Security update for librelp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1891-1 Security update for librelp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0822-1 Security update for librelp SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2018-1223 Critical: librelp security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 24, 2018
- ALAS2-2018-998 Critical: librelp security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 19, 2018
References
- USN-3612-1 vendor-advisory
- GLSA-201804-21 vendor-advisory
- https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tcp.c#L1205
- RHSA-2018:1703 vendor-advisory
- RHSA-2018:1704 vendor-advisory
- RHSA-2018:1702 vendor-advisory
- RHSA-2018:1225 vendor-advisory
- RHSA-2018:1707 vendor-advisory
- https://lgtm.com/rules/1505913226124/
- RHSA-2018:1223 vendor-advisory
- DSA-4151 vendor-advisory
- RHSA-2018:1701 vendor-advisory
- http://packetstormsecurity.com/files/172829/librelp-Remote-Code-Execution.html