cyberstrikeus 1.5.4 Ensure prelink is not installed (Automated)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
prelink is a program that modifies ELF shared libraries and ELF dynamically linked binaries in such a way that the time needed for the dynamic linker to perform relocations at startup significantly decreases.
Rationale
The prelinking feature can interfere with the operation of AIDE, because it changes binaries. Prelinking can also increase the vulnerability of the system if a malicious user is able to compromise a common library such as libc.
Audit Procedure
Command Line
Verify prelink is not installed:
dpkg-query -s prelink &>/dev/null && echo "prelink is installed"
Expected Result
Nothing should be returned.
Remediation
Command Line
Run the following command to restore binaries to normal:
prelink -ua
Uninstall prelink using the appropriate package manager or manual installation:
apt purge prelink
References
- NIST SP 800-53 Rev. 5: CM-6, CM-1, CM-3
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.14 Log Sensitive Data Access | X | ||
| v7 | 14.9 Enforce Detail Logging for Access or Changes to Sensitive Data | X |
MITRE ATT&CK Mappings
| Techniques / Sub-techniques | Tactics | Mitigations |
|---|---|---|
| T1055, T1055.009, T1065, T1065.001 | TA0002 | M1050 |