CVE-2022-3310 is a vulnerability identified in Google Chrome on Android versions prior to 106.0.5249.62. The issue stems from insufficient policy enforcement within the custom tabs feature of Chrome. Custom tabs are a mechanism that allows applications to open web content within the app context, leveraging Chrome's rendering engine but maintaining some separation from the app itself. The vulnerability allows an attacker who can convince a user to install a malicious application to bypass the same origin policy (SOP). SOP is a critical web security mechanism that restricts how documents or scripts loaded from one origin can interact with resources from another origin, preventing unauthorized data access or manipulation. By exploiting this vulnerability, the attacker’s crafted application can circumvent SOP restrictions, potentially enabling unauthorized access to sensitive information or manipulation of web content that should be isolated. The vulnerability is classified under CWE-602 (Improper Restriction of XML External Entity Reference), indicating a failure in enforcing security policies properly. The CVSS v3.1 score is 6.5 (medium severity), with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but user interaction is required (UI:R). The impact affects integrity (I:H) but not confidentiality or availability. No known exploits in the wild have been reported, and no official patch links were provided in the data, but the issue is resolved in Chrome version 106.0.5249.62 and later. This vulnerability specifically affects Android users of Chrome who may install malicious applications that leverage this flaw to bypass SOP protections within custom tabs, potentially leading to unauthorized manipulation of web content or data integrity violations.

For European organizations, this vulnerability poses a moderate risk primarily to Android users who utilize Chrome for accessing web applications, especially those relying on custom tabs for in-app browsing experiences. The bypass of the same origin policy can lead to unauthorized modification or injection of content within web sessions, potentially undermining the integrity of web-based workflows or data exchanges. While confidentiality is not directly impacted, the integrity compromise could facilitate phishing, session manipulation, or unauthorized transactions within web applications. This is particularly concerning for sectors with high reliance on mobile web applications, such as financial services, e-commerce, and government services. The requirement for user interaction (installing a malicious app) reduces the likelihood of widespread exploitation but does not eliminate targeted attacks, especially spear-phishing campaigns aimed at employees or users of critical services. Given the widespread use of Chrome on Android devices across Europe, organizations with mobile workforces or BYOD policies are at risk if devices are not updated promptly. The absence of known exploits in the wild suggests limited active exploitation but does not preclude future attacks, especially as threat actors develop proof-of-concept exploits.

European organizations should prioritize updating all Android devices running Google Chrome to version 106.0.5249.62 or later to ensure the vulnerability is patched. Mobile device management (MDM) solutions should be leveraged to enforce timely updates and restrict installation of untrusted or unknown applications to reduce the risk of malicious app installation. User awareness campaigns should emphasize the risks of installing applications from unverified sources and encourage vigilance against social engineering attempts. Application whitelisting and enhanced app vetting processes can further reduce the attack surface. For organizations developing or deploying mobile applications that use Chrome custom tabs, a security review should be conducted to assess potential exposure and implement additional safeguards, such as validating the origin of content loaded in custom tabs and monitoring for anomalous behaviors. Network-level protections, such as mobile endpoint security solutions, can help detect suspicious app behaviors or network traffic indicative of exploitation attempts. Finally, continuous monitoring of threat intelligence feeds for any emerging exploits related to CVE-2022-3310 is recommended to adapt defenses proactively.