Vulnerability · Published Apr 14, 2021 · Assigned by mitre

CVE-2021-28098

High 7.8

In plain English

A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS NVD)7.8High

Exploit odds (30 days)0.4%top 63.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

An issue was discovered in Forescout CounterACT before 8.1.4. A local privilege escalation vulnerability is present in the logging function. SecureConnector runs with administrative privileges and writes logs entries to a file in %PROGRAMDATA%\ForeScout SecureConnector\ that has full permissions for the Everyone group. Using a symbolic link allows an attacker to point the log file to a privileged location such as %WINDIR%\System32. The resulting log file adopts the file permissions of the source of the symbolic link (in this case, the Everyone group). The log file in System32 can be replaced and renamed with a malicious DLL for DLL hijacking.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://docs.forescout.com x_refsource_MISC
https://www.adversis.io/research/2021/3/30/forescout-secure-connector-local-privilege-escalation x_refsource_MISC
https://jordanpotti.com/2021/03/30/forescout-priv-esc-folder-permissions/ x_refsource_MISC