CVE-2023-50969 Vulnerability Threatens SecureSphere Users

The vulnerability lies in the manipulation of "Content-Encoding" headers within HTTP requests, coupled with the transmission of specifically encoded POST data.

by Ashish Khaitan April 2, 2024 in Firewall Daily, Vulnerabilities Reading Time: 3 mins read 0

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A critical security flaw, identified as , has recently been discovered in Imperva SecureSphere, a popular on-premise Web Application Firewall (WAF). 

This poses a risk to organizations, potentially leading to severe security breaches. 

With a CVSS score of 9.8, it allows attackers to bypass crucial security protocols designed to thwart common web-based attacks such as SQL injection and cross-site scripting.

Updates on the Imperva SecureSphere Vulnerability (CVE-2023-50969)

Source: NVD

The vulnerability lies in the manipulation of “Content-Encoding” headers within HTTP requests, coupled with the transmission of specifically encoded POST data. 

This exploitation technique enables malicious actors to clandestinely inject harmful payloads past the WAF's defenses. Essentially, attackers can exploit this flaw to target vulnerabilities within applications that the WAF was intended to safeguard.

Security researcher HoyaHaxa has provided technical insights into how this vulnerability can be exploited. By skillfully manipulating HTTP request headers and encoding POST data, attackers can circumvent security measures, potentially targeting an organization's digital infrastructure.

Source: HoyaHaxa

Imperva has confirmed that the impacts specific versions of SecureSphere WAF. Organizations using the Imperva SecureSphere WAF v14.7.0.40 and Any version of Imperva SecureSphere lacking the Application Defense Center (ADC) update released on February 26, 2024, are susceptible to this threat.

Mitigation Techniques Against the Imperva SecureSphere Vulnerability

It's worth noting that Imperva Cloud WAF customers remain unaffected by this vulnerability. Recommended actions for organizations utilizing Imperva SecureSphere WAF, include applying the ADC rule update released by Imperva on February 26, 2024. Detailed instructions for implementing this update can be found on the official Imperva Support Portal documentation.

Another technique to mitigate against Imperva SecureSphere vulnerability is conducting a comprehensive audit of your web applications, focusing on vulnerabilities that were previously shielded by the WAF.

This vulnerability highlights the pivotal role of in fortifying organizations against cyber threats. Given the severity of the CVE-2023-50969 vulnerability, organizations utilizing Imperva SecureSphere WAF must take immediate action to mitigate the risk of exploitation. 

By implementing these mitigation techniques and remaining vigilant against emerging threats, organizations can enhance their cybersecurity posture and protect their digital assets from potential breaches. Moreover, this is an ongoing story and The Cyber Express will share any new information on the vulnerability or any security patches shared by the organization. 


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