CVE-2018-20103 : Security Advisory and Response
Learn about CVE-2018-20103, a vulnerability in HAProxy version 1.8.14 that allows crafted packets to trigger infinite recursion, potentially leading to stack exhaustion. Find out how to mitigate and prevent exploitation.
HAProxy version 1.8.14 contains a vulnerability in its dns.c file that allows crafted packets to cause infinite recursion, potentially leading to stack exhaustion.
Understanding CVE-2018-20103
This CVE involves a specific vulnerability in HAProxy version 1.8.14 that can be exploited through manipulated compressed pointers.
What is CVE-2018-20103?
An issue in the dns.c file of HAProxy through version 1.8.14 allows a crafted packet to trigger infinite recursion by manipulating compressed pointers, leading to stack exhaustion.
The Impact of CVE-2018-20103
The vulnerability can be exploited to cause stack exhaustion, potentially resulting in a denial of service (DoS) condition.
Technical Details of CVE-2018-20103
HAProxy version 1.8.14 is susceptible to a specific vulnerability that can have serious consequences.
Vulnerability Description
The vulnerability in dns.c allows crafted packets to manipulate compressed pointers, causing infinite recursion and stack exhaustion.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions affected: HAProxy version 1.8.14
Exploitation Mechanism
Crafted packets can exploit the vulnerability by manipulating compressed pointers, leading to infinite recursion and potential stack exhaustion.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of CVE-2018-20103.
Immediate Steps to Take
- Update HAProxy to a non-vulnerable version.
- Implement network-level protections to filter out potentially malicious packets.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch software to mitigate known vulnerabilities.
- Conduct security assessments and audits to identify and address potential weaknesses.
- Stay informed about security advisories and best practices in network security.
Patching and Updates
- Apply patches provided by HAProxy to fix the vulnerability.
- Stay informed about any further updates or security advisories related to HAProxy.