CVE-2007-5196 in Linux
Summary
by MITRE
Unspecified vulnerability in the SSL implementation in Groupwise client system in the novell-groupwise-client package in SUSE Linux Enterprise Desktop 10 allows remote attackers to obtain credentials via a man-in-the-middle attack, a different vulnerability than CVE-2007-5195.
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Analysis
by VulDB Data Team • 03/15/2025
The vulnerability described in CVE-2007-5196 represents a critical security flaw within the SSL implementation of the Novell Groupwise client system running on SUSE Linux Enterprise Desktop 10. This issue specifically affects the client-side SSL/TLS certificate validation mechanisms that are essential for establishing secure communications between Groupwise clients and mail servers. The vulnerability arises from insufficient certificate verification processes that fail to properly validate the authenticity of SSL certificates presented by remote servers during the connection establishment phase.
This security weakness creates a significant attack vector for man-in-the-middle adversaries who can exploit the flawed SSL implementation to intercept and potentially manipulate communications between Groupwise clients and their target mail servers. The vulnerability specifically impacts the client-side certificate validation logic where the system fails to properly verify certificate chains, check certificate expiration dates, or validate certificate signatures against trusted certificate authorities. Attackers can leverage this weakness to present fake certificates that appear legitimate to the vulnerable client system, thereby enabling credential theft and unauthorized access to email accounts.
The operational impact of this vulnerability extends beyond simple credential theft to encompass broader security implications for enterprise email environments. Organizations using Novell Groupwise client systems on SUSE Linux Enterprise Desktop 10 face substantial risk of unauthorized access to sensitive corporate communications, potential data exfiltration, and compromise of employee email accounts that may contain confidential business information. The vulnerability's classification as a man-in-the-middle attack vector means that attackers can monitor, modify, or redirect communications without detection, making it particularly dangerous for organizations that rely heavily on secure email communications.
Security professionals should note that this vulnerability differs from CVE-2007-5195, indicating that multiple SSL-related flaws exist within the same software component. The technical flaw manifests in the client-side SSL implementation where certificate validation routines are insufficient to detect forged certificates, creating a gap in the security model that violates fundamental SSL/TLS security principles. This vulnerability aligns with CWE-295 which addresses improper certificate validation and CWE-310 which covers cryptographic issues in certificate handling.
Organizations should implement immediate mitigations including updating to patched versions of the novell-groupwise-client package, implementing additional network security controls such as certificate pinning, and deploying network monitoring tools to detect potential man-in-the-middle attacks. The remediation process should also involve comprehensive security assessments of all Groupwise client installations and consideration of alternative email clients that provide more robust SSL/TLS implementations. Additionally, organizations should review their certificate management practices and ensure that all client systems maintain updated trust stores with valid root certificates from recognized certificate authorities.
The attack surface for this vulnerability is particularly concerning in enterprise environments where Groupwise clients connect to mail servers over untrusted networks or public internet connections, making the implementation of proper SSL/TLS security controls essential for protecting sensitive corporate communications and maintaining compliance with industry security standards such as those outlined in NIST SP 800-52 and ISO/IEC 27001 requirements for secure communication protocols.