CVE-2020-35573 : Security Advisory and Response

PostSRSd before 1.10 allows remote attackers to cause a denial of service (CPU consumption) via a long timestamp tag in an SRS address.

Understanding CVE-2020-35573

This CVE involves a vulnerability in PostSRSd that can be exploited by attackers to trigger a denial of service attack through excessive CPU consumption.

What is CVE-2020-35573?

The CVE-2020-35573 vulnerability in PostSRSd before version 1.10 enables malicious actors to disrupt services by exploiting a specific component within the software.

The Impact of CVE-2020-35573

The vulnerability allows remote attackers to exploit the system, leading to a denial of service condition due to high CPU consumption, potentially disrupting normal operations.

Technical Details of CVE-2020-35573

PostSRSd before version 1.10 is susceptible to a denial of service attack due to a flaw in processing timestamp tags within SRS addresses.

Vulnerability Description

The vulnerability in srs2.c in PostSRSd before 1.10 permits attackers to execute a denial of service attack by sending a specially crafted SRS address with a lengthy timestamp tag.

Affected Systems and Versions

Product: PostSRSd
Vendor: N/A
Versions affected: All versions before 1.10

Exploitation Mechanism

Attackers can exploit this vulnerability by sending manipulated SRS addresses containing extended timestamp tags, causing the system to consume excessive CPU resources.

Mitigation and Prevention

To address CVE-2020-35573, users and administrators should take immediate steps and implement long-term security practices to mitigate risks and prevent potential attacks.

Immediate Steps to Take

Update PostSRSd to version 1.10 or newer to eliminate the vulnerability.
Monitor system resources for any unusual CPU consumption that could indicate a potential attack.

Long-Term Security Practices

Regularly update software and apply security patches to prevent known vulnerabilities.
Implement network monitoring and intrusion detection systems to identify and respond to suspicious activities.

Patching and Updates

Stay informed about security advisories and updates from the PostSRSd vendor to promptly address any new vulnerabilities and apply patches.