CVE-2001-1125 in LiveUpdate
Summary
by MITRE
Symantec LiveUpdate before 1.6 does not use cryptography to ensure the integrity of download files, which allows remote attackers to execute arbitrary code via DNS spoofing of the update.symantec.com site.
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Analysis
by VulDB Data Team • 01/16/2025
The vulnerability identified as CVE-2001-1125 represents a critical security flaw in Symantec LiveUpdate software versions prior to 1.6, specifically addressing the absence of cryptographic integrity verification mechanisms for downloaded files. This weakness stems from the software's failure to implement proper cryptographic controls during the update process, creating a significant attack surface that malicious actors could exploit through DNS spoofing techniques. The vulnerability operates within the broader context of software update security where integrity verification is paramount to prevent unauthorized modifications to critical system components.
The technical implementation flaw resides in the LiveUpdate client's trust model which relies entirely on DNS resolution for determining update sources without validating the cryptographic integrity of downloaded files. When a user's system attempts to download updates from update.symantec.com, the software performs DNS lookups to resolve the domain name but lacks mechanisms to verify that the downloaded files have not been tampered with during transit. This design decision creates a fundamental security gap where attackers can manipulate DNS responses to redirect update requests to malicious servers hosting compromised files. The vulnerability directly maps to CWE-310, which encompasses cryptographic issues including the absence of proper integrity checks and the failure to implement secure communication protocols.
The operational impact of this vulnerability is severe and multifaceted, as it enables remote code execution attacks that can compromise entire systems without requiring local user privileges. Attackers exploiting this vulnerability can successfully execute arbitrary code by poisoning DNS records for the update.symantec.com domain, causing the vulnerable LiveUpdate client to download and execute malicious payloads. This attack vector aligns with ATT&CK technique T1195.001, which describes the use of DNS spoofing to redirect traffic to malicious endpoints. The vulnerability affects systems running Symantec products that utilize LiveUpdate for security patches and software updates, potentially allowing attackers to escalate privileges, install backdoors, or deploy additional malware components.
The exploitation of this vulnerability demonstrates the critical importance of secure update mechanisms in enterprise security environments where software patch management is essential for maintaining system integrity. Organizations relying on Symantec LiveUpdate for security updates faced significant risks, as attackers could compromise their systems through seemingly legitimate update processes. This vulnerability highlights the necessity of implementing cryptographic verification mechanisms such as digital signatures and hash validation in all software update systems. The security implications extend beyond immediate code execution capabilities to include potential data breaches, system compromise, and the establishment of persistent malicious footholds within network environments. Mitigation efforts required immediate patching of LiveUpdate clients to version 1.6 or later, along with network-level DNS security measures to prevent DNS spoofing attacks. The vulnerability serves as a historical example of how insufficient cryptographic controls in update mechanisms can create severe security risks that persist across multiple attack vectors and threat models.