CVE-2016-0099 vulnerability in Microsoft Products
Published on March 9, 2016
Known Exploited Vulnerability
This Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. A privilege escalation vulnerability exists in Microsoft Windows if the Windows Secondary Logon Service fails to properly manage request handles in memory. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator.
The following remediation steps are recommended / required by March 24, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2016-0099 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Classic Buffer Overflow Vulnerability?
The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. A buffer overflow condition exists when a program attempts to put more data in a buffer than it can hold, or when a program attempts to put data in a memory area outside of the boundaries of a buffer. The simplest type of error, and the most common cause of buffer overflows, is the "classic" case in which the program copies the buffer without restricting how much is copied. Other variants exist, but the existence of a classic overflow strongly suggests that the programmer is not considering even the most basic of security protections.
CVE-2016-0099 has been classified to as a Classic Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2016-0099
Want to know whenever a new CVE is published for Microsoft products? stack.watch will email you.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.