CVE-2015-5119 is a critical use-after-free vulnerability in the ByteArray class within the ActionScript 3 implementation of Adobe Flash Player. This vulnerability affects versions 13.x through 13.0.0.296, 14.x through 18.0.0.194 on Windows and OS X, and 11.x through 11.2.202.468 on Linux. It allows remote attackers to execute arbitrary code or cause a denial of service through specially crafted Flash content that overrides a valueOf function. This vulnerability was actively exploited in the wild in July 2015, emphasizing its critical nature.
The CVSS score for this vulnerability is 9.8, classified as critical. It has a low attack complexity and does not require any privileges or user interaction, making it particularly dangerous. The potential for significant impact on confidentiality, integrity, and availability further underscores the urgency for organizations to address this vulnerability.
Given the exploitation status and the critical ramifications, organizations should prioritize patching immediately. The affected versions of Adobe Flash Player are no longer supported; thus, organizations still utilizing this software must take immediate action to mitigate the risks.
The urgency is significantly heightened due to the known exploitation of this vulnerability in the wild. Organizations must ensure that they are not exposed to the associated risks and should consider disconnection of the product if still in use, as it has reached its end-of-life.
Vulnerability Details
The official description of this vulnerability states: 'Use-after-free vulnerability in the ByteArray class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.296 and 14.x through 18.0.0.194 on Windows and OS X and 11.x through 11.2.202.468 on Linux allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that overrides a valueOf function, as exploited in the wild in July 2015.'
CWE classification for this vulnerability is CWE-416. The vulnerability is significant due to its ability to allow remote code execution and resultant denial of service.
The CVSS version 3.1 score is 9.8, indicating critical severity. The attack vector is network-based with a low attack complexity, no required privileges, and no user interaction needed. The impact includes high confidentiality, integrity, and availability impact.
Technical Analysis
The root cause of this vulnerability stems from the use-after-free error in memory management in the ActionScript 3 environment. Attackers may leverage this flaw by crafting malicious Flash content that triggers the vulnerability during execution.
The attack vector is primarily network-based, allowing exploitation through malicious Flash content served over the internet. The attack complexity is low, requiring no advanced skills to successfully exploit the vulnerability.
No user interaction is required for exploitation, which means that simply viewing a webpage containing the malicious Flash content can lead to exploitation. The consequences of such exploitation include potential unauthorized access to sensitive data, system compromise, and service interruptions.
Risk & Impact Analysis
Risk to organizations includes significant potential for data breaches, system control loss, and service disruption. The blast radius of such an attack can be extensive, impacting not just individual systems but potentially leading to widespread organizational vulnerabilities.
This vulnerability's criticality and exploitation history necessitate immediate remediation efforts. Organizations that fail to address this vulnerability risk severe reputational damage and compliance issues, particularly if sensitive data is compromised.
Given the CVSS score and the presence in the Known Exploited Vulnerabilities (KEV) catalog, organizations should act swiftly to mitigate risks associated with this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
Affected versions include Adobe Flash Player 13.x through 13.0.0.296, 14.x through 18.0.0.194 on Windows and OS X, and 11.x through 11.2.202.468 on Linux. If version information is missing, all versions prior to vendor patch are affected.
Mitigation & Remediation
Organizations should prioritize patching immediately. The affected product is end-of-life, and if still in use, it should be disconnected. For those requiring continued operation, alternative solutions such as using a secure virtual environment can be explored.
Configuration hardening should be implemented to limit the attack surface. Additionally, organizations should monitor for any unusual behavior or signs of exploitation in their systems.
For detailed security assessments, organizations can utilize penetration testing services to identify and mitigate vulnerabilities.
Detection Guidance
Organizations should look for specific log indicators that reveal unauthorized access attempts or unusual errors related to Flash Player. Behavioral anomalies in system performance can also indicate potential exploitation.
Monitoring network traffic for signatures associated with known exploits related to this vulnerability is crucial for early detection.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2015-5119 lies in its representation of the risks associated with legacy software products still in use within organizations. The vulnerability highlights the importance of timely updates and the dangers posed by unsupported software.
This situation reflects a broader trend of increasing exploitation of vulnerabilities in outdated technology, which can serve as a gateway for more sophisticated attacks. Security teams must adopt a proactive posture by implementing regular vulnerability assessments and staying informed about the evolving threat landscape.
For organizations seeking to enhance their defense posture, engaging in strategic initiatives such as vulnerability management programs can be invaluable.
Additionally, understanding the intricacies of the vulnerabilities, such as CVE-2015-5119, can be facilitated through resources on penetration testing methodology and how they can be mitigated.
Ultimately, organizations must prioritize understanding and remediating vulnerabilities like CVE-2015-5119 to prevent future incidents.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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