critical
9.8
CWE
119 787
Advisory Published
Updated

CVE-2018-1000140: Buffer Overflow

First published: Fri Mar 23 2018(Updated: )

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. Upstream patch: <a href="https://github.com/rsyslog/librelp/commit/2cfe657672636aa5d7d2a14cfcb0a6ab9d1f00cf">https://github.com/rsyslog/librelp/commit/2cfe657672636aa5d7d2a14cfcb0a6ab9d1f00cf</a> References: <a href="https://lgtm.com/rules/1505913226124/">https://lgtm.com/rules/1505913226124/</a> <a href="https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tcp.c#L1205">https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tcp.c#L1205</a>

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
rsyslog librelp<=1.2.14
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Canonical Ubuntu Linux=14.04
Redhat Enterprise Linux Desktop=6.0
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux Server=6.0
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Server Aus=6.6
Redhat Enterprise Linux Server Aus=7.2
Redhat Enterprise Linux Server Aus=7.3
Redhat Enterprise Linux Server Aus=7.4
Redhat Enterprise Linux Server Aus=7.6
Redhat Enterprise Linux Server Eus=6.7
Redhat Enterprise Linux Server Eus=7.3
Redhat Enterprise Linux Server Eus=7.4
Redhat Enterprise Linux Server Eus=7.5
Redhat Enterprise Linux Server Eus=7.6
Redhat Enterprise Linux Server Tus=6.6
Redhat Enterprise Linux Server Tus=7.2
Redhat Enterprise Linux Server Tus=7.3
Redhat Enterprise Linux Server Tus=7.4
Redhat Enterprise Linux Server Tus=7.6
Redhat Enterprise Linux Workstation=6.0
Redhat Enterprise Linux Workstation=7.0
redhat/librelp<1.2.15
1.2.15
ubuntu/librelp<1.2.14-3ubuntu0.1~
1.2.14-3ubuntu0.1~
ubuntu/librelp<1.2.2-2ubuntu1.1
1.2.2-2ubuntu1.1
ubuntu/librelp<1.2.15-1
1.2.15-1
ubuntu/librelp<1.2.9-1ubuntu0.1~
1.2.9-1ubuntu0.1~
debian/librelp
1.10.0-1
1.11.0-1

Remedy

https://github.com/rsyslog/librelp/blob/532aa362f0f7a8d037505b0a27a1df452f9bac9e/src/tcp.c#L1205

Remedy

https://github.com/rsyslog/librelp/commit/2cfe657672636aa5d7d2a14cfcb0a6ab9d1f00cf

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2018-1000140?

    CVE-2018-1000140 is a Buffer Overflow vulnerability in rsyslog librelp version 1.2.14 and earlier.

  • How severe is CVE-2018-1000140?

    CVE-2018-1000140 has a severity rating of 9.8 (Critical).

  • How can CVE-2018-1000140 be exploited?

    CVE-2018-1000140 can be exploited by a remote attacker who can connect to rsyslog and trigger a stack buffer overflow.

  • How do I fix CVE-2018-1000140?

    To fix CVE-2018-1000140, update to rsyslog librelp version 1.2.15.

  • Where can I find more information about CVE-2018-1000140?

    You can find more information about CVE-2018-1000140 at the following references: [1] [2] [3].

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