SB2025040221 - Multiple vulnerabilities in Trend Micro Deep Security

Description

This security bulletin contains information about 3 vulnerabilities.

1) Link following (CVE-ID: CVE-2025-30640)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insecure link following issue. A local user can create a symbolic link to a critical file on the system and overwrite it with elevated privileges.

2) Link following (CVE-ID: CVE-2025-30641)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insecure link following issue within the anti-malware solution. A local user can create a symbolic link to a critical file on the system and overwrite it with elevated privileges.

3) Link following (CVE-ID: CVE-2025-30642)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insecure link following issue. A local user can create a symbolic link to a critical file on the system and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://success.trendmicro.com/en-US/solution/KA-0019344
• https://www.zerodayinitiative.com/advisories/ZDI-25-239/
• https://www.zerodayinitiative.com/advisories/ZDI-25-240/
• https://www.zerodayinitiative.com/advisories/ZDI-25-241/