Buffer Overflow Vulnerability in rsyslog librelp Affects Multiple Versions
CVE-2018-1000140

9.8CRITICAL

Key Information:

Vendor

Rsyslog

Status
Librelp
Vendor
CVE Published:
23 March 2018

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-1000140?

The rsyslog librelp version 1.2.14 and earlier is susceptible to a buffer overflow vulnerability caused by improper handling of x509 certificates in peer communications. A remote attacker who gains access to the rsyslog instance can exploit this vulnerability by sending a specially crafted x509 certificate, potentially leading to remote code execution on the affected system. This vulnerability underscores the importance of verifying peer certificate integrity to ensure secure operations.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

rsyslog-librelp-CVE-2018-1000140
Created by s0

rsyslog-librelp-CVE-2018-1000140-fixed
Created by s0

References

https://usn.ubuntu.com/3612-1/
vendor-advisory
https://security.gentoo.org/glsa/201804-21
vendor-advisory
https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d03...

EPSS Score

9% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.