CVE-2018-1000140
A stack-based buffer overflow was found in the way librelp parses X.509 certificates. By connecting or accepting connections from a remote peer, an attacker may use a specially crafted X.509 certificate to exploit this flaw and potentially execute arbitrary code.
Find out more about CVE-2018-1000140 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v3 metrics
| CVSS3 Base Score | 8.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | High |
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux Extended Update Support 7.4 (librelp) | RHSA-2018:1704 | 2018-05-23 |
| Red Hat Enterprise Linux Server TUS (v. 7.2) (librelp) | RHSA-2018:1703 | 2018-05-23 |
| Red Hat Enterprise Linux Advanced Update Support 6.6 (librelp) | RHSA-2018:1701 | 2018-05-23 |
| Red Hat Enterprise Linux Server Update Services for SAP Solutions 7.2 (librelp) | RHSA-2018:1703 | 2018-05-23 |
| Red Hat Enterprise Linux Advanced Update Support 7.2 (librelp) | RHSA-2018:1703 | 2018-05-23 |
| Red Hat Enterprise Linux Extended Update Support 7.3 (librelp) | RHSA-2018:1707 | 2018-05-23 |
| Red Hat Enterprise Linux 7 (librelp) | RHSA-2018:1223 | 2018-04-24 |
| Red Hat Enterprise Linux Extended Update Support 6.7 (librelp) | RHSA-2018:1702 | 2018-05-23 |
| Red Hat Enterprise Linux Server TUS (v. 6.6) (librelp) | RHSA-2018:1701 | 2018-05-23 |
| Red Hat Enterprise Linux 6 (librelp) | RHSA-2018:1225 | 2018-04-24 |
Acknowledgements
Red Hat would like to thank Rainer Gerhards (rsyslog) for reporting this issue. Upstream acknowledges Bas van Schaik (lgtm.com / Semmle) and Kevin Backhouse (lgtm.com / Semmle) as the original reporters.Mitigation
Users are strongly advised not to expose their logging RELP services to a public network.