CVE-2018-18508 : Security Advisory and Response

Network Security Services (NSS) versions prior to 3.36.7 and 3.41.1 are susceptible to a crash triggered by a malformed signature, leading to a Denial of Service.

Understanding CVE-2018-18508

Versions of NSS before 3.36.7 and 3.41.1 are vulnerable to a crash caused by a null dereference due to a malformed signature, resulting in a Denial of Service.

What is CVE-2018-18508?

NSS versions prior to 3.36.7 and 3.41.1 are at risk of crashing due to a null dereference from a malformed signature.
The vulnerability can be exploited to cause a Denial of Service (DoS) attack.

The Impact of CVE-2018-18508

A successful exploit can lead to a crash in NSS, resulting in a DoS condition.
Attackers can potentially disrupt services and cause system unavailability.

Technical Details of CVE-2018-18508

NSS vulnerability details and affected systems.

Vulnerability Description

Malformed signatures in NSS versions before 3.36.7 and 3.41.1 can trigger a crash due to a null dereference.

Affected Systems and Versions

Products: NSS
Vendor: Mozilla
Vulnerable Versions:
NSS < 3.36.7
NSS < 3.41.1

Exploitation Mechanism

Attackers can exploit the vulnerability by crafting a specially designed malformed signature to trigger a null dereference and crash NSS, causing a DoS.

Mitigation and Prevention

Protecting systems from CVE-2018-18508.

Immediate Steps to Take

Update NSS to versions 3.36.7 or 3.41.1 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Apply patches provided by Mozilla to address the vulnerability in affected NSS versions.