CVE-2025-33120 Overview
CVE-2025-33120 is a local privilege escalation vulnerability affecting IBM QRadar Security Information and Event Management (SIEM) versions 7.5 through 7.5.0 UP13. The flaw allows an authenticated user to elevate privileges through a misconfigured cronjob that executes with unnecessary privileges [CWE-250]. IBM tracks this issue under support advisory node 7242869.
Critical Impact
An authenticated local user can escalate to elevated privileges on the QRadar appliance, compromising confidentiality, integrity, and availability of the SIEM platform.
Affected Products
- IBM QRadar Security Information and Event Manager 7.5.0 through 7.5.0 UP13
- IBM QRadar Incident Forensics 7.5.0 through 7.5.0 UP13
- All update packs from base 7.5.0 through Update Pack 13
Discovery Timeline
- 2025-08-22 - CVE CVE-2025-33120 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-33120
Vulnerability Analysis
The vulnerability resides in QRadar's scheduled task infrastructure. A cronjob on the appliance runs with excessive privileges relative to the operations it performs. An authenticated user with local access can influence or leverage the cronjob's execution context to run commands at a higher privilege level than the account itself holds.
The weakness maps to CWE-250: Execution with Unnecessary Privileges. This class of flaw arises when a scheduled or system component runs as root or another privileged account but processes inputs, scripts, or files that are writable or influenceable by lower-privileged users.
Because QRadar is the central logging and detection platform in many environments, privilege escalation on the appliance can allow tampering with detection rules, log integrity, and forwarding pipelines.
Root Cause
The root cause is a misconfigured cronjob that executes with unnecessary privileges. QRadar's periodic task runs under a privileged account while operating on resources that an authenticated lower-privileged user can modify. This mismatch between execution context and resource permissions enables the escalation path.
Attack Vector
Exploitation requires local access with valid authenticated credentials on the QRadar host. No user interaction is required beyond the attacker's own session. The attack complexity is low, and successful exploitation yields high impact to confidentiality, integrity, and availability. No public proof-of-concept or in-the-wild exploitation has been reported at the time of publication.
Exploitation typically involves identifying the privileged cronjob, locating the writable script, binary, or configuration file it consumes, and staging a payload that executes when the scheduler next runs the job. See the IBM Support advisory for vendor guidance.
Detection Methods for CVE-2025-33120
Indicators of Compromise
- Unexpected modifications to files under /etc/cron.d/, /etc/cron.daily/, /etc/cron.hourly/, or QRadar-specific cron directories on the appliance.
- Processes spawned by cron or crond executing shells, interpreters, or QRadar binaries outside normal scheduled patterns.
- New or modified files owned by non-privileged QRadar users in paths later executed by root-owned cronjobs.
- Unexpected setuid binaries or elevated shell sessions correlated with cron execution windows.
Detection Strategies
- Monitor auditd or equivalent OS auditing for execve calls where the parent process is cron and the child process runs as root, correlating against baseline task inventories.
- Track file integrity on all scripts and configuration files referenced by QRadar cronjobs, alerting on writes performed by non-root accounts.
- Review QRadar audit logs for authentication events immediately preceding privilege changes or configuration modifications.
Monitoring Recommendations
- Enable file integrity monitoring on /etc/cron*, /var/spool/cron/, and QRadar service directories.
- Baseline scheduled task inventories and alert on deviations from expected job counts, owners, and command lines.
- Forward host audit logs from QRadar appliances to an independent collection point so evidence survives local compromise.
How to Mitigate CVE-2025-33120
Immediate Actions Required
- Apply the fix documented in the IBM Support advisory (node 7242869) to all QRadar SIEM and QRadar Incident Forensics deployments running 7.5.0 through 7.5.0 UP13.
- Restrict interactive and shell access to QRadar appliances to a minimal set of administrators.
- Audit the accounts that hold local access on QRadar hosts and remove unused or dormant credentials.
- Verify permissions on all cron-referenced scripts and configuration files, ensuring only privileged accounts can write to them.
Patch Information
IBM has released an update addressing the misconfigured cronjob. Refer to the IBM Support Page for the specific update pack or fix that remediates CVE-2025-33120. Customers on 7.5.0 UP13 or earlier should apply the vendor-supplied remediation.
Workarounds
- Where immediate patching is not feasible, tighten file permissions on scripts and directories consumed by privileged cronjobs so only root can modify them.
- Reduce the privilege level of the affected cronjob to the minimum required, if operationally supported by IBM guidance.
- Enforce strict authentication controls and multi-factor authentication for any account with local access to QRadar hosts.
# Verify ownership and permissions on cron directories on the QRadar appliance
ls -la /etc/cron.d/ /etc/cron.daily/ /etc/cron.hourly/
find /etc/cron.d/ -type f ! -user root -o ! -group root
find /etc/cron.d/ -type f -perm /o+w -o -perm /g+w
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
