CVE-2022-35406 in Burp Suite
Summary
by MITRE • 07/08/2022
A URL disclosure issue was discovered in Burp Suite before 2022.6. If a user views a crafted response in the Repeater or Intruder, it may be incorrectly interpreted as a redirect.
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Analysis
by VulDB Data Team • 07/20/2022
The vulnerability identified as CVE-2022-35406 represents a URL disclosure issue within Burp Suite, a widely used web application security testing tool that has been a cornerstone in the cybersecurity industry for years. This flaw exists in versions prior to 2022.6 and specifically affects how the application handles crafted responses within its Repeater and Intruder modules. The vulnerability stems from improper handling of HTTP response parsing where certain crafted responses can be misinterpreted by the tool's internal processing logic, potentially exposing sensitive URL information that should remain hidden during security testing operations.
The technical implementation of this vulnerability lies in the way Burp Suite processes and displays HTTP responses when users interact with the Repeater or Intruder components. When a user loads a crafted response that contains specific URL patterns or redirect indicators, the tool's parsing mechanism fails to properly validate the response structure. This misinterpretation occurs because the application does not adequately sanitize or verify the format of incoming response data before displaying it to the user interface. The flaw essentially allows a maliciously constructed response to trigger an incorrect redirect interpretation, which can inadvertently reveal URL information that was not intended to be disclosed during normal security testing activities.
From an operational standpoint, this vulnerability poses significant risks to security professionals who rely on Burp Suite for their penetration testing and vulnerability assessment work. The URL disclosure could potentially expose internal network paths, authentication endpoints, or other sensitive information that attackers might exploit to gain deeper insights into target systems. The impact extends beyond simple information disclosure as it could enable attackers to craft more sophisticated attacks by leveraging the exposed URL patterns. Security teams using older versions of Burp Suite may unknowingly expose sensitive data during routine testing activities, particularly when analyzing responses from systems that might contain embedded URLs or redirect information that could be exploited by malicious actors.
This vulnerability aligns with CWE-200, which addresses improper exposure of sensitive information, and demonstrates how seemingly benign parsing issues can result in significant security implications. The flaw also relates to ATT&CK technique T1071.004, which covers application layer protocol usage, as it involves improper handling of HTTP protocol elements during security testing operations. Organizations using Burp Suite for security assessments should consider this vulnerability as part of their broader security posture, particularly in environments where sensitive data might be processed through the tool. The issue underscores the importance of keeping security tools updated, as this vulnerability was addressed in the 2022.6 release, demonstrating how even widely trusted security tools can contain flaws that require regular maintenance and updates.
The mitigation strategy for this vulnerability involves upgrading to Burp Suite version 2022.6 or later, where the URL parsing logic has been corrected to properly validate response structures. Security teams should also implement additional monitoring of their Burp Suite usage to detect any unusual response handling patterns that might indicate exploitation attempts. Organizations should conduct regular vulnerability assessments of their security tooling to ensure that all components remain up-to-date with the latest security patches and improvements. This vulnerability serves as a reminder that security professionals must maintain rigorous update schedules for their tools, as even essential security applications can contain flaws that might be exploited by threat actors.