CVE-2015-7610 in Zimbra Collaboration
Summary
by MITRE
Cross-site request forgery (CSRF) vulnerability in the login form in Zimbra Collaboration Suite (aka ZCS) before 8.6.0 Patch 10, 8.7.x before 8.7.11 Patch 2, and 8.8.x before 8.8.8 Patch 1 allows remote attackers to hijack the authentication of unspecified victims by leveraging failure to use a CSRF token.
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Analysis
by VulDB Data Team • 06/05/2020
The CVE-2015-7610 vulnerability represents a critical cross-site request forgery flaw within the Zimbra Collaboration Suite authentication mechanism. This vulnerability affects multiple versions of the Zimbra email and collaboration platform, specifically targeting the login form implementation that fails to properly validate cross-site requests. The issue stems from the absence of proper CSRF token validation during authentication processes, creating a significant security risk for organizations relying on this email infrastructure. The vulnerability impacts versions prior to 8.6.0 Patch 10, 8.7.x before 8.7.11 Patch 2, and 8.8.x before 8.8.8 Patch 1, indicating a widespread exposure across the Zimbra product line.
The technical exploitation of this vulnerability occurs when an attacker crafts malicious web pages or emails that trick authenticated users into making unintended requests to the Zimbra server. Without proper CSRF token validation, the authentication system cannot distinguish between legitimate user requests and forged requests originating from malicious third-party sites. This weakness directly violates the fundamental security principle of request verification and allows attackers to perform actions on behalf of authenticated users without their knowledge or consent. The vulnerability specifically affects the login form functionality where CSRF protection mechanisms are either absent or insufficiently implemented, creating a pathway for unauthorized authentication hijacking.
The operational impact of this vulnerability extends beyond simple credential theft, as it enables attackers to perform authenticated actions within the Zimbra environment with the privileges of legitimate users. This could lead to unauthorized email access, message manipulation, calendar alterations, contact management changes, and potentially full administrative control depending on the user's permission levels. The attack vector is particularly dangerous because it requires no prior authentication or credentials from the attacker, making it a significant threat to email security and data integrity. Organizations using affected Zimbra versions face elevated risk of data breaches, email spoofing, and unauthorized access to sensitive corporate communications.
Organizations should immediately implement the available patches from Zimbra to address this vulnerability, specifically upgrading to versions 8.6.0 Patch 10, 8.7.11 Patch 2, or 8.8.8 Patch 1. Security teams should also consider implementing additional protective measures such as monitoring for suspicious authentication patterns and reviewing access logs for potential unauthorized activities. The vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery, and represents a critical threat in the ATT&CK framework under the Credential Access and Defense Evasion techniques. Until patching is complete, organizations should consider implementing web application firewalls and additional authentication controls to mitigate the risk of exploitation.