CVE-2021-3139
8.1 · HIGHOverview
CVE-2021-3139 is a high-severity vulnerability affecting tcmu-runner_project tcmu-runner. It was published on January 13, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
In Open-iSCSI tcmu-runner 1.3.x, 1.4.x, and 1.5.x through 1.5.2, xcopy_locate_udev in tcmur_cmd_handler.c lacks a check for transport-layer restrictions, allowing remote attackers to read or write files via directory traversal in an XCOPY request. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. NOTE: relative to CVE-2020-28374, this is a similar mistake in a different algorithm.
Remediation
Check the references section for vendor advisories and patches from tcmu-runner_project. Update tcmu-runner to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| tcmu-runner_project | tcmu-runner | 1.3.0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-3139?
CVE-2021-3139 is a high-severity vulnerability affecting tcmu-runner_project tcmu-runner. It was published on January 13, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
How severe is CVE-2021-3139?
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-3139?
Check the references section for vendor advisories and patches from tcmu-runner_project. Update tcmu-runner to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-3139?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-3139 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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