CVE-2017-2530 in iCloud
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. Safari before 10.1.1 is affected. iCloud before 6.2.1 on Windows is affected. tvOS before 10.2.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.
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Analysis
by VulDB Data Team • 12/24/2020
The vulnerability identified as CVE-2017-2530 represents a critical memory corruption flaw within Apple's WebKit rendering engine that affected multiple Apple operating systems and applications. This vulnerability resides in the core web browsing component responsible for rendering web content across iOS, macOS, tvOS, and Windows iCloud applications. The flaw specifically manifests in how WebKit processes certain crafted web content, creating opportunities for remote code execution or system instability that can be exploited through malicious websites without user interaction. The vulnerability affects iOS versions prior to 10.3.2, Safari versions before 10.1.1, iCloud for Windows versions before 6.2.1, and tvOS versions before 10.2.1, indicating a widespread impact across Apple's ecosystem. The technical nature of this flaw falls under CWE-119 which describes weaknesses in memory management, specifically memory corruption issues that can lead to arbitrary code execution. This vulnerability operates at the intersection of multiple attack vectors as defined by the MITRE ATT&CK framework under the technique T1059.003 for command and scripting interpreter, where an attacker could potentially leverage the memory corruption to execute malicious code on a target system.
The operational impact of CVE-2017-2530 extends beyond simple application crashes to represent a significant threat to user security and system integrity. Remote attackers can exploit this vulnerability by hosting malicious web content that, when loaded in affected browsers, triggers memory corruption that can result in arbitrary code execution with the privileges of the affected application. This means that successful exploitation could allow attackers to install malware, steal sensitive data, or take complete control of affected devices. The vulnerability's remote nature makes it particularly dangerous as users can be compromised simply by visiting a malicious website, even without clicking on any specific elements or downloading files. The memory corruption aspect of the flaw suggests that attackers could potentially leverage heap-based buffer overflows or use-after-free conditions that are commonly exploited in modern attack scenarios. This vulnerability demonstrates how a single flaw in a widely used component like WebKit can create cascading security issues across multiple platforms and applications, making it a prime target for nation-state actors and sophisticated threat groups.
Mitigation strategies for CVE-2017-2530 should prioritize immediate patch deployment across all affected systems, as Apple released security updates specifically addressing this vulnerability in their respective software releases. Organizations should implement network-based protections such as web application firewalls and content filtering solutions that can detect and block known malicious web content patterns. Browser hardening measures including disabling unnecessary plugins, implementing strict content security policies, and using sandboxing technologies can provide additional layers of defense. Security monitoring should include detection of unusual network traffic patterns and application behavior that might indicate exploitation attempts. Users should be educated about the risks of visiting untrusted websites and the importance of keeping their software updated. The vulnerability's classification as a memory corruption issue aligns with industry best practices for vulnerability management as outlined in NIST SP 800-40 and ISO/IEC 27001 standards. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other web rendering components and ensure comprehensive protection against similar attack vectors. Organizations should also consider implementing automated patch management systems to ensure rapid deployment of security updates across their entire infrastructure.