CVE-2013-0013 in Windows
Summary
by MITRE
The SSL provider component in Microsoft Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, Windows 7 Gold and SP1, Windows 8, Windows Server 2012, and Windows RT does not properly handle encrypted packets, which allows man-in-the-middle attackers to conduct SSLv2 downgrade attacks against (1) SSLv3 sessions or (2) TLS sessions by intercepting handshakes and injecting content, aka "Microsoft SSL Version 3 and TLS Protocol Security Feature Bypass Vulnerability."
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 04/20/2021
The vulnerability identified as CVE-2013-0013 represents a critical security flaw in Microsoft Windows operating systems that affects SSL/TLS protocol implementation across multiple platform versions. This vulnerability specifically targets the SSL provider component responsible for handling encrypted network communications, creating a pathway for sophisticated man-in-the-middle attacks that can compromise the integrity of secure connections. The flaw enables attackers to manipulate secure communications by intercepting and modifying handshake processes, effectively bypassing the security features designed to protect against such attacks.
The technical mechanism behind this vulnerability involves improper handling of encrypted packets within the Windows SSL provider component, which creates a window of opportunity for attackers to perform SSLv2 downgrade attacks against established SSLv3 and TLS sessions. This protocol downgrade capability allows malicious actors to force connections to use weaker cryptographic protocols, making it easier to intercept and decrypt sensitive data transmitted over supposedly secure channels. The vulnerability is particularly dangerous because it operates at the protocol level, affecting the fundamental security mechanisms that protect network communications.
From an operational perspective, this vulnerability exposes organizations to significant risks including data interception, credential theft, and unauthorized access to sensitive information. The attack vector requires minimal sophistication, as attackers only need to intercept network traffic and inject carefully crafted content to exploit the vulnerability. This makes the threat particularly widespread and difficult to detect, as legitimate network traffic can be compromised without raising obvious alarms. Organizations with systems running affected Windows versions face potential exposure to various cyber threats including corporate espionage, financial fraud, and intellectual property theft.
The security implications extend beyond immediate data compromise to include long-term trust erosion in network communications and potential cascading effects throughout enterprise networks. Attackers can leverage this vulnerability to establish persistent access points, conduct extended surveillance operations, and potentially pivot to other systems within compromised networks. This vulnerability aligns with ATT&CK technique T1041 for Exfiltration Over C2 Channel and CWE-310 for Cryptographic Issues, specifically addressing weaknesses in cryptographic protocol implementation and security feature bypass mechanisms. Organizations should implement immediate mitigations including protocol version restrictions, network monitoring for unusual traffic patterns, and deployment of updated security patches to prevent exploitation of this vulnerability.