STIGUI
V-215329CAT II — Medium severitySV-215329r1268251_rule

The AIX ldd command must be disabled.

Rule version AIX7-00-003016 · STIG v3 · 2026-08-31

Discussion

The ldd command provides a list of dependent libraries needed by a given binary, which is useful for troubleshooting software. Instead of parsing the binary file, some ldd implementations invoke the program with a special environment variable set, which causes the system dynamic linker to display the list of libraries. Specially crafted binaries can specify an alternate dynamic linker which may cause a program to be executed instead of examined. If the program is from an untrusted source, such as in a user home directory, or a file suspected of involvement in a system compromise, unauthorized software may be executed with the rights of the user running ldd.

Check

Consult vendor documentation concerning the "ldd" command.

If the command provides protection from the execution of untrusted executables, this is not a finding.

Determine the location of the system's "ldd" command: # find / -name ldd

If no file exists, this is not a finding.

Check the permissions of the found "ldd" file:

# ls -lL <path to ldd> ---------- 1 bin bin 6289 Feb 28 2017 /usr/bin/ldd

If the file mode of the file is more permissive than "0000", this is a finding

Fix

Disable the "ldd" command by removing its permissions using command: # chmod 0000 <path to ldd>

Identifiers

Group ID
V-215329
Group title
SRG-OS-000480-GPOS-00227
Rule ID
SV-215329r1268251_rule
Check ID
C-16527r294438_chk
Fix ID
F-16525r294439_fix