CVE-2023-50249 : Exploit Details and Defense Strategies

Understanding CVE-2023-50249

Sentry's Astro SDK has been found vulnerable to ReDoS (Regular expression Denial of Service) attack, impacting versions 7.78.0 to 7.86.0, allowing attackers to exploit it to cause denial of service.

What is CVE-2023-50249?

CVE-2023-50249 is a vulnerability in Sentry's Astro SDK, affecting versions 7.78.0 to 7.86.0. The vulnerability allows attackers to trigger excessive computation times on the server, resulting in a denial of service condition.

The Impact of CVE-2023-50249

The impact of this vulnerability is significant as it can lead to denial of service attacks, affecting the availability of the affected systems. Attackers can exploit this weakness to disrupt services and cause downtime.

Technical Details of CVE-2023-50249

Sentry's Astro SDK vulnerability stems from uncontrolled resource consumption, leading to a ReDoS vulnerability with a CVSS v3.1 base score of 7.5 (High severity). The attack complexity is low, but the availability impact is high.

Vulnerability Description

The vulnerability in the Sentry's Astro SDK allows an attacker to exploit regular expressions to cause excessive computation times, resulting in a denial of service condition.

Affected Systems and Versions

The affected product is the Sentry-Javascript SDK versions between 7.78.0 to 7.86.0. The vulnerability has been found in the Astro SDK component within this version range.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted input that triggers the regular expression engine in the SDK, leading to prolonged computation times and eventual denial of service.

Mitigation and Prevention

To mitigate the CVE-2023-50249 vulnerability, immediate actions must be taken to secure the affected systems and prevent potential exploitation.

Immediate Steps to Take

Update the Sentry's Astro SDK to the patched version 7.87.0 to eliminate the vulnerability. Implement strict input validation to prevent malicious input triggering the ReDoS vulnerability.

Long-Term Security Practices

Regularly update software components, including SDKs, to ensure that security patches are applied promptly. Conduct regular security assessments and audits to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories and updates from Sentry. Promptly apply patches and updates to ensure that vulnerabilities are addressed and security measures are up to date.