CVE-2020-15855 in Bodhi
Summary
by MITRE • 10/07/2022
Two cross-site scripting vulnerabilities were fixed in Bodhi 5.6.1.
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Analysis
by VulDB Data Team • 10/31/2022
The vulnerability identified as CVE-2020-15855 represents a critical security flaw affecting the Bodhi Linux distribution version 5.6.1, specifically targeting cross-site scripting vulnerabilities within its web interface components. This issue stems from insufficient input validation and output encoding mechanisms that allow malicious actors to inject arbitrary script code into web pages viewed by other users. The affected system operates as a web-based package management and update distribution platform, making it a prime target for attackers seeking to exploit user sessions or execute unauthorized commands through browser-based attacks.
These cross-site scripting vulnerabilities arise from improper sanitization of user-supplied data within the Bodhi web application's handling of package metadata, user comments, and other interactive elements. The flaw manifests when the application fails to adequately escape or encode special characters in user-provided content before rendering it in HTML contexts, creating opportunities for attackers to inject malicious javascript payloads. The vulnerability affects both reflected and stored XSS vectors, allowing attackers to manipulate the application's behavior and potentially escalate privileges or steal session cookies from authenticated users.
The operational impact of CVE-2020-15855 extends beyond simple data theft or defacement, as it enables attackers to establish persistent access to the Bodhi update system and potentially compromise the integrity of package distribution channels. An attacker could exploit these vulnerabilities to modify package information, inject malicious code into software updates, or redirect users to phishing sites that appear legitimate within the Bodhi interface. This threat model aligns with CWE-79 which categorizes cross-site scripting as a fundamental web application security weakness, and maps to ATT&CK technique T1566 which covers spearphishing through social engineering.
Security mitigation strategies for CVE-2020-15855 should prioritize immediate deployment of the patched Bodhi version 5.6.1, which implements proper input validation and output encoding mechanisms. Organizations should also implement content security policies to prevent unauthorized script execution, conduct regular security assessments of web applications, and establish robust monitoring for suspicious user activities. The fix addresses the root cause by implementing comprehensive sanitization routines that properly escape special characters and validate all user inputs before processing or rendering in web contexts, aligning with industry best practices for XSS prevention and reducing the attack surface through proper security controls.