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CVE-2016-8020 is a high-severity vulnerability affecting Intel Security VirusScan Enterprise for Linux (VSEL) version 2.0.3 and earlier. Categorized under CWE-94: Improper Control of Generation of Code ('Code Injection'), this flaw allows remote authenticated users to execute arbitrary code via crafted HTTP request parameters. Given the potential for a complete system compromise, this vulnerability represents a critical risk to organizations that have not yet applied the necessary patches.
Targeted Sectors and Countries
Industries such as financial services, healthcare, and government are particularly at risk, given their reliance on robust cybersecurity measures. While no specific countries have been targeted to date, sectors within highly developed nations are more likely to be affected due to the prevalent use of Linux-based security solutions.
CVE-2016-8020 Technical Information
CVE-2016-8020 arises from inadequate input validation within Intel's VirusScan Enterprise for Linux. Specifically, an attacker can manipulate environment variables through untrusted query parameters, enabling the execution of arbitrary commands on the affected system. The CVSS v3.0 base score for this vulnerability is 8.0 (HIGH), with a vector of AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H. The CVSS v2.0 base score is 6.0 (MEDIUM), with a vector of AV:N/AC:M/Au:S/C:P/I:P/A:P
Key Technical Details:
Vulnerability Type: Improper Control of Generation of Code ('Code Injection')
Affected Software: Intel Security VirusScan Enterprise for Linux (VSEL) 2.0.3 and earlier
CVSS v3.0 Base Score: 8.0 (HIGH)
CVSS v2.0 Base Score: 6.0 (MEDIUM)
The primary risk involves the execution of arbitrary commands, potentially leading to a full system compromise. This vulnerability is particularly dangerous in environments where these versions of VSEL are deployed without adequate access controls or network segmentation.
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Exploitation in the Wild
While there have been no confirmed reports of CVE-2016-8020 being actively exploited in the wild, the high-risk nature of this vulnerability necessitates immediate attention. The absence of exploitation reports does not mitigate the potential damage this vulnerability could cause if leveraged by a skilled attacker. Indicators of Compromise (IOCs) for this vulnerability include:
Unexpected command executions
Abnormal HTTP request patterns
Unauthorized changes to environment variables
APT Groups Using This Vulnerability
Currently, there is no direct attribution linking CVE-2016-8020 to specific Advanced Persistent Threat (APT) groups. However, the nature of this vulnerability makes it attractive to cyber espionage groups and attackers targeting sectors that rely heavily on Linux-based security solutions.
Affected Product Versions
Intel Security VirusScan Enterprise for Linux (VSEL): Versions 2.0.3 and earlier
Workaround and Mitigation
To mitigate the risks associated with CVE-2016-8020, organizations should implement the following strategies:
Patch and Update: Ensure that all installations of VirusScan Enterprise for Linux are updated to a version that addresses this vulnerability. McAfee has released patches, and it is critical to apply these updates immediately.
Network Segmentation: Isolate vulnerable systems from untrusted networks to limit exposure.
Input Validation: Implement robust input validation mechanisms to prevent injection attacks.
Monitor and Audit: Regularly monitor and audit systems for signs of compromise and unusual activity.
References
NVD Entry: NVD - CVE-2016-8020
SecurityFocus: BID 94823
SecurityTracker: ID 1037433
McAfee Security Bulletin: SB10181
Exploit Database: Exploit 40911
About Rescana
At Rescana, we specialize in Continuous Threat and Exposure Management (CTEM), helping our customers stay ahead of evolving cybersecurity threats. Our platform provides comprehensive visibility into vulnerabilities like CVE-2016-8020, enabling proactive risk management and mitigation.
For any questions about this report or other cybersecurity concerns, please reach out to us at ops@rescana.com.
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