Buffer overflow in Rsyslog Librelp
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. 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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.093 (95.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.095 · newest: 0.093 · change: -0.002
Affected products
- Rsyslog Librelp
- Canonical Ubuntu Linux — versions 14.04
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 6.6, 7.2, 7.3
- Red Hat Enterprise Linux Server Eus — versions 6.7, 7.3, 7.4
- Red Hat Enterprise Linux Server Tus — versions 6.6, 7.2, 7.3
- Red Hat Enterprise Linux Workstation — versions 6.0, 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- usn.ubuntu.com/3612-1/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201804-21 (vendor-advisory, Third Party Advisory)
- github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tc… (Patch, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1703 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1704 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1702 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1225 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1707 (vendor-advisory, Third Party Advisory)
- lgtm.com/rules/1505913226124/ (Exploit, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1223 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-1000140?
- CVE-2018-1000140 is a critical-severity vulnerability in Rsyslog Librelp, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-03-23.
- How severe is CVE-2018-1000140?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-1000140 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.