Vulnerability CVE-2018-1000140
Published: 2018-03-23

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.

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Rsyslog -> Librelp 
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 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 References:
https://access.redhat.com/errata/RHSA-2018:1223
https://access.redhat.com/errata/RHSA-2018:1225
https://access.redhat.com/errata/RHSA-2018:1701
https://access.redhat.com/errata/RHSA-2018:1702
https://access.redhat.com/errata/RHSA-2018:1703
https://access.redhat.com/errata/RHSA-2018:1704
https://access.redhat.com/errata/RHSA-2018:1707
https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tcp.c#L1205
https://lgtm.com/rules/1505913226124/
https://security.gentoo.org/glsa/201804-21
https://usn.ubuntu.com/3612-1/
https://www.debian.org/security/2018/dsa-4151
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